LOUISVILLE, KY - MARCH, 1:   Republican presidential candidate Donald Trump speaks at the Kentucky International Convention Center March 1, 2016 in Louisville, Kentucky. Trump is campaigning nationwide on Super Tuesday, the single largest primary voting day. (Photo by Aaron P. Bernstein/Getty Images)
PHOTO: Aaron P. Bernstein/Getty Images North America/Getty Images
LOUISVILLE, KY - MARCH, 1: Republican presidential candidate Donald Trump speaks at the Kentucky International Convention Center March 1, 2016 in Louisville, Kentucky. Trump is campaigning nationwide on Super Tuesday, the single largest primary voting day. (Photo by Aaron P. Bernstein/Getty Images)
Now playing
30:46
Donald Trump's Super Tuesday press conference
clinton trump woman card origwx bw_00001517.jpg
PHOTO: CNN
clinton trump woman card origwx bw_00001517.jpg
Now playing
00:47
Hillary Clinton and Donald Trump on the 'woman card'
PHOTO: Pool
Now playing
01:23
Super Tuesday in under 90 seconds
Now playing
00:10
This video is no longer available
Republican frontrunner Donald Trump speaks at Trump Tower in New York on April 26 after winning primaries in Pennsylvania, Maryland, Connecticut, Rhode Island and Delaware.
PHOTO: KENA BETANCUR/AFP/Getty Images
Republican frontrunner Donald Trump speaks at Trump Tower in New York on April 26 after winning primaries in Pennsylvania, Maryland, Connecticut, Rhode Island and Delaware.
Now playing
01:37
Donald Trump: I'm winning, why should I change?
PHOTO: Pool
Now playing
00:56
Clinton: Our campaign is about restoring confidence
van jones donald trump bizarre outcome sot ac_00002728.jpg
PHOTO: CNN
van jones donald trump bizarre outcome sot ac_00002728.jpg
Now playing
01:23
Van Jones: Donald Trump's sweep a 'bizarre outcome'
PHOTO: Pool
Now playing
01:05
Sanders: We have bigger lead over Trump than Clinton
PHOTO: cnn
Now playing
01:55
Ted Cruz: Trump 'likely to win some states'
PHOTO: CNN
Now playing
01:07
Trump: Hillary will be easier to beat than others
HAGERSTOWN, MD - APRIL 24:  Republican presidential candidate Donald Trump speaks while campaigning at the Hagerstown airport April 24, 2016 in Hagerstown, Maryland. Maryland holds their presidential primary on Tuesday, along with Delaware, Pennsylvania, Rhode Island and Connecticut.  (Photo by Win McNamee/Getty Images)
PHOTO: Win McNamee/Getty Images
HAGERSTOWN, MD - APRIL 24: Republican presidential candidate Donald Trump speaks while campaigning at the Hagerstown airport April 24, 2016 in Hagerstown, Maryland. Maryland holds their presidential primary on Tuesday, along with Delaware, Pennsylvania, Rhode Island and Connecticut. (Photo by Win McNamee/Getty Images)
Now playing
01:23
Polls shows voters warming towards Trump nomination
PHOTO: Getty Images/CNN Politics
Now playing
02:09
3 things to watch for on Super Tuesday 4
PHOTO: Win McNamee/Getty Images
Now playing
00:54
Jane Sanders: Bernie 'will not play role of spoiler'
Democratic presidential candidate former Secretary of State Hillary Clinton speaks during her primary night gathering on March 15, 2016 in West Palm Beach, Florida.
PHOTO: Justin Sullivan/Getty Images
Democratic presidential candidate former Secretary of State Hillary Clinton speaks during her primary night gathering on March 15, 2016 in West Palm Beach, Florida.
Now playing
02:20
Highlights from Super Tuesday 3 speeches
PHOTO: CNN
Now playing
02:04
Highlights from the Super Tuesday 2 speeches
best of super tuesday speeches wrap origwx nws_00004301.jpg
best of super tuesday speeches wrap origwx nws_00004301.jpg
Now playing
01:41
The best of the Super Tuesday speeches
super tuesday coverage two minutes origwx js_00005610.jpg
super tuesday coverage two minutes origwx js_00005610.jpg
Now playing
02:03
Six hours of Super Tuesday coverage in 2 minutes
Saturday Night Live Trump hand size orig vstan dlewis_00000000.jpg
PHOTO: Fox News / "Saturday Night Live" / Broadway Media
Saturday Night Live Trump hand size orig vstan dlewis_00000000.jpg
Now playing
01:03
'SNL' mocks Trump's hand-size feud
brokered convention possibility explained orig_00000000.jpg
brokered convention possibility explained orig_00000000.jpg
Now playing
01:35
What is a brokered convention?
Trump and Clinton
PHOTO: CNN
Trump and Clinton
Now playing
01:22
Two victory speeches, two different messages
Hillary Clinton Arizona win primary speech sot  _00001913.jpg
Hillary Clinton Arizona win primary speech sot _00001913.jpg
Now playing
00:56
Clinton: Contest between fundamentally different views
PHOTO: Getty Images
Now playing
02:19
Super Tuesday scenarios: Can Sanders slow Clinton?
HOUSTON, TX - FEBRUARY 25:  Republican presidential candidates  Florida Sen. Marco Rubio (R-FL), Donald Trump, and Texas Sen. Ted Cruz (R-TX) stand on stage for the Republican National Committee Presidential Primary Debate at the University of Houston's Moores School of Music Opera House on February 25, 2016 in Houston, Texas. The candidates are meeting for the last  Republican debate before the Super Tuesday primaries on March 1.  (Photo by Joe Raedle/Getty Images)
PHOTO: Joe Raedle/Getty Images
HOUSTON, TX - FEBRUARY 25: Republican presidential candidates Florida Sen. Marco Rubio (R-FL), Donald Trump, and Texas Sen. Ted Cruz (R-TX) stand on stage for the Republican National Committee Presidential Primary Debate at the University of Houston's Moores School of Music Opera House on February 25, 2016 in Houston, Texas. The candidates are meeting for the last Republican debate before the Super Tuesday primaries on March 1. (Photo by Joe Raedle/Getty Images)
Now playing
01:47
Super Tuesday scenarios: Can Donald Trump be stopped?
Bernie Sanders speaks during a campaign rally at West High School on March 21, 2016 in Salt Lake City, Utah.
PHOTO: George Frey/Getty Images
Bernie Sanders speaks during a campaign rally at West High School on March 21, 2016 in Salt Lake City, Utah.
Now playing
00:45
Bernie Sanders: We're gaining on Clinton
PHOTO: Nigel Parry for CNN
Now playing
00:53
CNN projection: Trump, Clinton win Arizona Primary
super tuesday march 15 in 2 minutes origwx js_00005623.jpg
super tuesday march 15 in 2 minutes origwx js_00005623.jpg
Now playing
01:57
Six hours of Super Tuesday #3 on CNN in 2 minutes
PHOTO: Nigel Parry for CNN
Now playing
01:00
Projection: Gov. John Kasich, Hillary Clinton win Ohio
@ 20: 48 - crowd cheers when CNN calls Ohio for Kasich
PHOTO: Pool
@ 20: 48 - crowd cheers when CNN calls Ohio for Kasich
Now playing
00:45
John Kasich: I will not take the low road
Donald Trump victory speech sot ac_00010508.jpg
Donald Trump victory speech sot ac_00010508.jpg
Now playing
01:17
Donald Trump: We have to bring our party together
CHARLOTTE, NC- MARCH 14:  Democratic presidential candidate former Secretary of State Hillary Clinton speaks during a Get Out the Vote event at Grady Cole Center on March 14, 2016 in Charlotte, North Carolina. Hillary Clinton is campaiging Illinois and North Carolina.  (Photo by Justin Sullivan/Getty Images)
PHOTO: Justin Sullivan/Getty Images
CHARLOTTE, NC- MARCH 14: Democratic presidential candidate former Secretary of State Hillary Clinton speaks during a Get Out the Vote event at Grady Cole Center on March 14, 2016 in Charlotte, North Carolina. Hillary Clinton is campaiging Illinois and North Carolina. (Photo by Justin Sullivan/Getty Images)
Now playing
00:48
Hillary Clinton: We're moving closer to the nomination
RENO, NV - FEBRUARY 23:  Republican presidential candidate Donald Trump speaks at a rally at the Nugget February 23, 2016 in Sparks, Nevada. The Nevada GOP caucus is tonight. (Photo by David Calvert/Getty Images)
PHOTO: David Calvert/Getty Images North America/Getty Images
RENO, NV - FEBRUARY 23: Republican presidential candidate Donald Trump speaks at a rally at the Nugget February 23, 2016 in Sparks, Nevada. The Nevada GOP caucus is tonight. (Photo by David Calvert/Getty Images)
Now playing
00:59
Donald Trump: Marco Rubio has a great future
PHOTO: CNN
Now playing
00:49
Marco Rubio: Not God's plan that I be president in 2016
Bernie Sanders phoenix arizona truth sot ac_00000119.jpg
Bernie Sanders phoenix arizona truth sot ac_00000119.jpg
Now playing
01:07
Bernie Sanders defiant despite primary losses
CNN Candidate Photography
John Kasich
ph: Nigel Parry
PHOTO: NIGEL PARRY for CNN
CNN Candidate Photography John Kasich ph: Nigel Parry
Now playing
03:25
John Kasich: We're proud of what we've done
PHOTO: Nigel Parry for CNN
Now playing
01:55
Projection: Donald Trump, Hillary Clinton win Florida
SHELBURNE, MA - MARCH 01: Voters check in before casting their ballots in the Shelburne Town Hall on March 01, 2016 in Shelburne, Massachusetts. Officials are expecting a record turnout of voters in Massachusetts, one of a dozen states holding Super Tuesday presidential primaries or caucuses. (Photo by Matthew Cavanaugh/Getty Images)
PHOTO: Matthew Cavanaugh/Getty Images
SHELBURNE, MA - MARCH 01: Voters check in before casting their ballots in the Shelburne Town Hall on March 01, 2016 in Shelburne, Massachusetts. Officials are expecting a record turnout of voters in Massachusetts, one of a dozen states holding Super Tuesday presidential primaries or caucuses. (Photo by Matthew Cavanaugh/Getty Images)
Now playing
00:56
High stakes for GOP on Super Tuesday
john kasich votes for president media avail sot nr_00005310.jpg
PHOTO: CNN
john kasich votes for president media avail sot nr_00005310.jpg
Now playing
00:54
John Kasich casts his vote in Ohio
The assassination of Julius Caesar (100 - 44 BC) at the Senate in Rome, 15th March 44 BC. (Photo by Archive Photos/Getty Images)
PHOTO: Archive Photos/Getty Images
The assassination of Julius Caesar (100 - 44 BC) at the Senate in Rome, 15th March 44 BC. (Photo by Archive Photos/Getty Images)
Now playing
01:54
Politicians, beware the Ides of March
PHOTO: CNN
Now playing
03:58
Sanders hopes to replicate Michigan magic in Ohio, Illinois
PHOTO: AFP/Getty Images
Now playing
01:44