marco rubio unifying the gop interview sotu _00002114.jpg
marco rubio unifying the gop interview sotu _00002114.jpg
Now playing
00:47
Marco Rubio wants to unify the GOP
MELBOURNE, FL - MARCH 14:  Republican presidential candidate Sen. Marco Rubio (R-FL) greets supporters while campaigning at That Little Restaurant March 14, 2016 in Melbourne, Florida. Florida holds its presidential primary tomorrow.  (Photo by Win McNamee/Getty Images)
Win McNamee/Getty Images
MELBOURNE, FL - MARCH 14: Republican presidential candidate Sen. Marco Rubio (R-FL) greets supporters while campaigning at That Little Restaurant March 14, 2016 in Melbourne, Florida. Florida holds its presidential primary tomorrow. (Photo by Win McNamee/Getty Images)
Now playing
01:27
CNN projection: Rubio wins Florida primary
Sen. Marco Rubio (R-FL) (left) confers with Sen. John McCain (R-AZ) (right) as U.S. Ambassador to Syria Robert Ford testifies before the Senate Foreign Relations Committee October 31, 2013 in Washington, D.C.
Win McNamee/Getty Images
Sen. Marco Rubio (R-FL) (left) confers with Sen. John McCain (R-AZ) (right) as U.S. Ambassador to Syria Robert Ford testifies before the Senate Foreign Relations Committee October 31, 2013 in Washington, D.C.
Now playing
03:04
Rubio, McCain test Trump's down ballot impact
WASHINGTON, DC - JANUARY 28:  U.S. Sen. Marco Rubio (R-FL) listens during a news conference on a comprehensive immigration reform framework January 28, 2013 on Capitol Hill in Washington, DC. A group of bipartisan senate members have reached to a deal of outlines to reform the nation immigration laws that will provide a pathway for the 11 million illegal immigrants in the country to citizenship.  (Photo by Alex Wong/Getty Images)
Getty Images
WASHINGTON, DC - JANUARY 28: U.S. Sen. Marco Rubio (R-FL) listens during a news conference on a comprehensive immigration reform framework January 28, 2013 on Capitol Hill in Washington, DC. A group of bipartisan senate members have reached to a deal of outlines to reform the nation immigration laws that will provide a pathway for the 11 million illegal immigrants in the country to citizenship. (Photo by Alex Wong/Getty Images)
Now playing
05:52
Rubio: Why I'm against Collins gun control amendment
Sen. John McCain (R-AZ), Sen. Charles Schumer (D-NY), Sen. Marco Rubio (R-FL), Senate Majority Whip Sen. Richard Durbin (D-IL), and Sen. Robert Menendez (D-NJ) share a moment during a news conference on a comprehensive immigration reform framework Monday.
Alex Wong/Getty Images
Sen. John McCain (R-AZ), Sen. Charles Schumer (D-NY), Sen. Marco Rubio (R-FL), Senate Majority Whip Sen. Richard Durbin (D-IL), and Sen. Robert Menendez (D-NJ) share a moment during a news conference on a comprehensive immigration reform framework Monday.
Now playing
01:08
Rubio says it's a 'safe assumption' he will run again
Marco Rubio on The Lead
CNN
Marco Rubio on The Lead
Now playing
01:16
Rubio: Plagiarism controversy doesn't matter
CNN
Now playing
01:25
Marco Rubio: Istanbul airport attack 'ISIS directed'
Senate TV
Now playing
03:28
Rubio discusses decision to leave Senate
CNN
Now playing
00:49
Marco Rubio: Not God's plan that I be president in 2016
CNN
Now playing
00:59
Rubio says Trump picking him for V.P. would backfire
OKATIE, SC - FEBRUARY 11:  Republican presidential candidate Sen. Marco Rubio (R-FL) speaks a campaign town hall meeting at the Sun City Hilton Head's Magnolia Hall February 11, 2016 in Okatie, South Carolina. Earlier in the week Rubio placed fifth in the New Hampshire primary, behind fellow GOP candidates Jeb Bush, John Kasich, Sen. Ted Cruz (R-TX) and Donald Trump, who won with 35 percent of the vote.  (Photo by Chip Somodevilla/Getty Images)
Chip Somodevilla/Getty Images/File
OKATIE, SC - FEBRUARY 11: Republican presidential candidate Sen. Marco Rubio (R-FL) speaks a campaign town hall meeting at the Sun City Hilton Head's Magnolia Hall February 11, 2016 in Okatie, South Carolina. Earlier in the week Rubio placed fifth in the New Hampshire primary, behind fellow GOP candidates Jeb Bush, John Kasich, Sen. Ted Cruz (R-TX) and Donald Trump, who won with 35 percent of the vote. (Photo by Chip Somodevilla/Getty Images)
Now playing
01:22
Rubio: Jeb's lock on Florida money was costly 2016 hurdle
NORTH CHARLESTON, SC - JANUARY 14:  Republican presidential candidates (L-R) New Jersey Governor Chris Christie and Sen. Marco Rubio (R-FL) participate in the Fox Business Network Republican presidential debate at the North Charleston Coliseum and Performing Arts Center on January 14, 2016 in North Charleston, South Carolina. (Photo by Scott Olson/Getty Images)
Scott Olson/Getty Images
NORTH CHARLESTON, SC - JANUARY 14: Republican presidential candidates (L-R) New Jersey Governor Chris Christie and Sen. Marco Rubio (R-FL) participate in the Fox Business Network Republican presidential debate at the North Charleston Coliseum and Performing Arts Center on January 14, 2016 in North Charleston, South Carolina. (Photo by Scott Olson/Getty Images)
Now playing
03:35
Rubio says he walked into 'trap' laid by Christie in N.H. Debate
MANCHESTER, NH - FEBRUARY 06:  Republican presidential candidates Jeb Bush and Sen. Marco Rubio (R-FL) participate in the Republican presidential debate at St. Anselm College February 6, 2016 in Manchester, New Hampshire. Sponsored by ABC News, the Independent Journal Review and Google, this is the final televised debate before voters go to the polls for the New Hampshire primary on February 9.  (Photo by Joe Raedle/Getty Images)
Joe Raedle/Getty Images North America/Getty Images
MANCHESTER, NH - FEBRUARY 06: Republican presidential candidates Jeb Bush and Sen. Marco Rubio (R-FL) participate in the Republican presidential debate at St. Anselm College February 6, 2016 in Manchester, New Hampshire. Sponsored by ABC News, the Independent Journal Review and Google, this is the final televised debate before voters go to the polls for the New Hampshire primary on February 9. (Photo by Joe Raedle/Getty Images)
Now playing
03:39
Rubio on running against one-time mentor Jeb Bush
marco rubio trump attack embarrassed sot_00001028.jpg
marco rubio trump attack embarrassed sot_00001028.jpg
Now playing
00:59
Rubio 'embarrassed' by his personal attack on Trump
Now playing
01:30
Miami's Cubans discuss Sen. Marco Rubio
Marco Rubio Trump rally violence election sotu_00000000.jpg
CNN
Marco Rubio Trump rally violence election sotu_00000000.jpg
Now playing
01:29
Rubio: Someone could die at Trump rally
rubio supporting gop nominee carroll sot nr_00011913.jpg
rubio supporting gop nominee carroll sot nr_00011913.jpg
Now playing
01:56
Rubio: 'I'll support nominee, but it's getting harder'
CNN
Now playing
02:31
Rubio to Trump: I am correct, not politically correct
CNN Republican Debate at the University of Miami.
Edward M. Pio Roda/CNN
CNN Republican Debate at the University of Miami.
Now playing
02:35
Donald Trump, Marco Rubio spar over Cuba
OKATIE, SC - FEBRUARY 11:  Republican presidential candidate Sen. Marco Rubio (R-FL) speaks a campaign town hall meeting at the Sun City Hilton Head's Magnolia Hall February 11, 2016 in Okatie, South Carolina. Earlier in the week Rubio placed fifth in the New Hampshire primary, behind fellow GOP candidates Jeb Bush, John Kasich, Sen. Ted Cruz (R-TX) and Donald Trump, who won with 35 percent of the vote.  (Photo by Chip Somodevilla/Getty Images)
Chip Somodevilla/Getty Images/File
OKATIE, SC - FEBRUARY 11: Republican presidential candidate Sen. Marco Rubio (R-FL) speaks a campaign town hall meeting at the Sun City Hilton Head's Magnolia Hall February 11, 2016 in Okatie, South Carolina. Earlier in the week Rubio placed fifth in the New Hampshire primary, behind fellow GOP candidates Jeb Bush, John Kasich, Sen. Ted Cruz (R-TX) and Donald Trump, who won with 35 percent of the vote. (Photo by Chip Somodevilla/Getty Images)
Now playing
01:02
Marco Rubio 'not proud' of some Trump attacks
rubio mocks trump tweets rally sot ath_00023314.jpg
CNN
rubio mocks trump tweets rally sot ath_00023314.jpg
Now playing
02:38
Rubio mocks Trump at Dallas rally
cnn houston debate recap origwx nws_00001511.jpg
cnn houston debate recap origwx nws_00001511.jpg
Now playing
01:30
CNN's Houston GOP debate in 90 seconds
marco rubio anti-establishment record dnt tuchman ac_00010517.jpg
marco rubio anti-establishment record dnt tuchman ac_00010517.jpg
Now playing
02:00
Marco Rubio looks to avoid 'establishment' label

Story highlights

Donald Trump says he isn't sure whether Marco Rubio is eligible for the presidency

Trump's latest move is similar to his efforts to question the eligibility of President Barack Obama and Ted Cruz

Washington CNN —  

Donald Trump says he’s not sure whether Marco Rubio is eligible for the presidency.

And Rubio says it’s just the latest in a line of Trump’s “outrageous” comments designed to suck up media attention.

Rubio is a U.S. citizen who was born in Miami. He is, in fact, eligible for the presidency – even though his parents migrated from Cuba.

But Trump stirred controversy on Saturday by retweeting a message suggesting that neither Rubio nor Texas Sen. Ted Cruz, who was born in Canada to a U.S. citizen mother, meet the constitutional requirements for the Oval Office.

In an interview on ABC’s “This Week” with George Stephanopoulos, Trump said he didn’t know about Rubio’s case.

He dismissed the importance of his move on Twitter, saying “it was a retweet – not so much with Marco,” implying that his concern is with the eligibility of Texas Sen. Ted Cruz, who was born in Canada to a U.S. citizen mother and is a U.S. citizen.

“I mean, let people make their own determination,” Trump said.

He said he doesn’t know whether Rubio is eligible to run for president.

“I’ve never looked at it, George,” Trump said. “I honestly have never looked at it. As somebody said, he’s not. And I retweeted it. I have 14 million people between Twitter and Facebook and Instagram, and I retweet things and we start dialogue and it’s very interesting.”

But Trump saying he’s unsure of Rubio’s eligibility is an about-face from a mid-January interview with CNN’s Jake Tapper.

In that interview, Trump said that while he doesn’t see Cruz as eligible for the presidency, he has no doubt of Rubio’s eligibility.

“It’s a very different thing,” Trump said then. “He was born here. He was born on the land. Ted was not born on the land, and there’s a very strict reading that you have to be born on the land.”

Rubio hit back hard on Trump’s insinuations on ABC’s “This Week.”

“Look, this is a pattern. This is a game he plays. He says something that’s edgy and outrageous and then the media flocks and covers that and then no one else can get any coverage on anything else,” Rubio said.

“And that worked when there were 15 people running for president. It’s not going to work anymore. I’m going to spend zero time on his interpretation of the Constitution with regards to eligibility,” he said. “And I’m going to spend all my time talking about what this campaign should be about.”

Questioning an opponent’s eligibility for the presidency is a common move for Trump.

In 2012, he repeatedly pressed for President Barack Obama to release his long-form birth certificate. Then, during his 2016 campaign, once Cruz narrowed the gap with Trump, Trump pointed to Cruz’s Canadian birth and said he should secure a court ruling making his eligibility clear.