Now playing
02:11
Joe Biden: If Trump doesn't comply, Congress must impeach
PHOTO: CNN
Now playing
04:01
Raskin: I'm not losing my son in 2020 and my country in 2021
Now playing
01:19
Sen. King: Cutting off Trump's intel access should be easy decision for Biden
A sign for the National Security Agency (NSA), US Cyber Command and Central Security Service, is seen near the visitor
A sign for the National Security Agency (NSA), US Cyber Command and Central Security Service, is seen near the visitor's entrance to the headquarters of the National Security Agency (NSA) after a shooting incident at the entrance in Fort Meade, Maryland, February 14, 2018. - Shots were fired early Wednesday at the ultra-secret National Security Agency, the US electronic spying agency outside Washington, leaving one person injured, officials said. Aerial footage of the scene from NBC News showed a black SUV with numerous bullet holes in its windshield crashed into concrete barriers at the main entrance to the NSA's headquarters in Fort Meade, Maryland. (Photo by SAUL LOEB / AFP) (Photo by SAUL LOEB/AFP via Getty Images)
PHOTO: Saul Loeb/AFP/Getty Images
Now playing
01:31
Christopher Miller orders NSA chief to install Trump loyalist as agency's top lawyer
Now playing
02:38
Biden: Science team 'among the brightest, most dedicated'
US President Donald Trump boards Air Force One before departing Harlingen, Texas on January 12, 2021. (Photo by MANDEL NGAN / AFP) (Photo by MANDEL NGAN/AFP via Getty Images)
US President Donald Trump boards Air Force One before departing Harlingen, Texas on January 12, 2021. (Photo by MANDEL NGAN / AFP) (Photo by MANDEL NGAN/AFP via Getty Images)
PHOTO: Mandel Ngan/AFP/Getty Images
Now playing
04:09
Fact Check: The lies that could define Trump's legacy
The Atlantic Ocean is seen adjacent to President Donald Trump
The Atlantic Ocean is seen adjacent to President Donald Trump's beach front Mar-a-Lago resort, also sometimes called his Winter White House, the day after Florida received an exemption from the Trump Administration's newly announced ocean drilling plan on January 11, 2018 in Palm Beach, Florida.
PHOTO: Joe Raedle/Getty Images
Now playing
03:19
Donald Trump's plan to move to Mar-a-Lago faces challenges
Trump talks to reporters while hosting Republican Congressional leaders and members of his cabinet in the Oval Office at the White House July 20, 2020 in Washington, DC.
Trump talks to reporters while hosting Republican Congressional leaders and members of his cabinet in the Oval Office at the White House July 20, 2020 in Washington, DC.
PHOTO: Doug Mills/Pool/Getty Images
Now playing
01:19
Historian on Trump's legacy: He's an 'asterisk president'
Mike Pence remarks vpx
Mike Pence remarks vpx
PHOTO: Senate TV
Now playing
02:27
New timeline shows just how close rioters got to Pence and his family
PHOTO: CNN
Now playing
01:48
FBI warns of potential armed protests across country
MyPillow notes
MyPillow notes
PHOTO: Jabin Botsford
Now playing
02:21
Photographer snaps notes of MyPillow CEO after visiting Trump
PHOTO: CNN
Now playing
04:31
Congressman concerned about being harmed by fellow lawmakers
Metropolitan Police Officer Michael Fanone
Metropolitan Police Officer Michael Fanone
PHOTO: CNN
Now playing
04:56
DC officers speak out following Capitol riot
Senator-elect Tommy Tuberville, a Republican from Alabama, stands for a photo at the US Capitol in Washington, DC, on November 9, 2020. (Photo by Stefani Reynolds / POOL / AFP) (Photo by STEFANI REYNOLDS/POOL/AFP via Getty Images)
Senator-elect Tommy Tuberville, a Republican from Alabama, stands for a photo at the US Capitol in Washington, DC, on November 9, 2020. (Photo by Stefani Reynolds / POOL / AFP) (Photo by STEFANI REYNOLDS/POOL/AFP via Getty Images)
PHOTO: STEFANI REYNOLDS/AFP via Getty Images
Now playing
03:20
Senator-elect Tommy Tuberville flubs 3 branches of government
MOON TOWNSHIP, PA - SEPTEMBER 22: Ivanka Trump and Jared Kushner listen as President Donald Trump speaks at a campaign rally at Atlantic Aviation on September 22, 2020 in Moon Township, Pennsylvania. Trump won Pennsylvania by less than a percentage point in 2016 and is currently in a tight race with Democratic nominee, former Vice President Joe Biden. (Photo by Jeff Swensen/Getty Images)
MOON TOWNSHIP, PA - SEPTEMBER 22: Ivanka Trump and Jared Kushner listen as President Donald Trump speaks at a campaign rally at Atlantic Aviation on September 22, 2020 in Moon Township, Pennsylvania. Trump won Pennsylvania by less than a percentage point in 2016 and is currently in a tight race with Democratic nominee, former Vice President Joe Biden. (Photo by Jeff Swensen/Getty Images)
PHOTO: Jeff Swensen/Getty Images
Now playing
01:55
Where do Ivanka Trump and Jared Kushner go from here?
FBI Director Christopher Wray speaks during a virtual news conference at the Department of Justice on October 28, 2020 in Washington, DC.
FBI Director Christopher Wray speaks during a virtual news conference at the Department of Justice on October 28, 2020 in Washington, DC.
PHOTO: Sarah Silbiger/Getty Images
Now playing
03:47
FBI director speaks publicly for first time since Capitol riots
(CNN) —  

Former Vice President Joe Biden said Tuesday if President Donald Trump does not cooperate with Congress, he would leave lawmakers with “no choice” but to start impeachment proceedings.

“It is time for this administration stop stonewalling and provide the Congress with all the facts it needs, including a copy of the formal complaint made by the whistleblower. And it’s time for the Congress to fully investigate the conduct of this President,” Biden said.

The Democratic presidential candidate said if Trump “does not comply with such a request from the Congress, if he continues to obstruct Congress, and flout the law, Donald Trump will leave Congress, in my view, no choice but to initiate impeachment.”

“That would be a tragedy, but a tragedy of his own making,” he said, speaking from Wilmington, Delaware.

Biden’s comments on Tuesday were the most direct statement he has made on impeachment. But by making his call for Trump’s removal conditional, he stopped short of some of his Democratic rivals, including Massachusetts Sen. Elizabeth Warren, who are calling for the House to impeach Trump now.

“I can take the political attacks,” Biden said. “They’ll come and they’ll go, and in time they’ll soon be forgotten, but if we allow a President to get away with shredding the United States Constitution, that will last forever.”

“Denying Congress the information, which it is constitutionally entitled to, and obstructing its efforts to investigate actions is not the conduct of an American President,” Biden said. “It’s an abuse of power.”

Biden said when he announced his candidacy he believed the “core values of this nation, our very democracy, was at risk.” He said “events in recent days have made that even clearer.”

Trump is facing intense criticism over a July phone call during which, according to a person familiar with the matter, he pressed Ukrainian President Volodymyr Zelensky to investigate Biden’s son, Hunter. There is no evidence of wrongdoing by either Joe or Hunter Biden. Trump on Sunday acknowledged the phone call and that he discussed Biden, but denied doing anything improper.

House Speaker Nancy Pelosi is expected to announce a formal impeachment inquiry later Tuesday, multiple sources on Capitol Hill tell CNN.

Trump tweeted Tuesday he has “authorized the release tomorrow of the complete, fully declassified and unredacted transcript of my phone conversation with President Zelensky of Ukraine.”

CNN confirmed Trump asked his acting chief of staff Mick Mulvaney to put a hold on millions in military aid to Ukraine roughly one week before a call with Zelensky, two senior administration officials said on Monday. The Washington Post first reported this.

The call between Trump and Zelensky, which took place one day after former special counsel Robert Mueller testified before Congress about Russian interference in US elections, was also part of a whistleblower complaint submitted to the Intelligence Community Inspector General, the source added. The Wall Street Journal was first to report Trump pressured Zelensky during the July phone call.

Trump admitted Tuesday he delayed aid to Ukraine ahead of the call to Zelensky, giving the excuse that he was waiting for European nations to contribute their fair share of aid.

The Washington Post first reported Monday Trump had directed his acting chief of staff Mick Mulvaney to freeze nearly $400 million of US military and security aid to Ukraine in the days before he spoke with Zelensky.

This story is breaking and will be updated.