Biden: If Trump blocks investigations, Congress has no choice but to impeach him

Former Vice President Joe BidenJoe BidenSanders to headline Iowa event amid impeachment trial Hillicon Valley: Biden calls for revoking tech legal shield | DHS chief 'fully expects' Russia to try to interfere in 2020 | Smaller companies testify against Big Tech 'monopoly power' Hill.TV's Krystal Ball on Sanders-Warren feud: 'Don't play to the pundits, play to voters' MORE said Tuesday that Congress should move forward with impeachment proceedings if the White House and Republicans work to block Democratic efforts to investigate matters "left undone" by special counsel Robert MuellerRobert (Bob) Swan MuellerSchiff: Trump acquittal in Senate trial would not signal a 'failure' Jeffries blasts Trump for attack on Thunberg at impeachment hearing Live coverage: House Judiciary to vote on impeachment after surprise delay MORE's investigation.

In an interview with ABC's "Good Morning America," the 2020 presidential candidate said that Democrats would have "no alternative" but to impeach President TrumpDonald John TrumpNational Archives says it altered Trump signs, other messages in Women's March photo Dems plan marathon prep for Senate trial, wary of Trump trying to 'game' the process Democratic lawmaker dismisses GOP lawsuit threat: 'Take your letter and shove it' MORE if he were to block a congressional investigation into whether he obstructed justice by firing former FBI Director James ComeyJames Brien ComeyNYT: Justice investigating alleged Comey leak of years-old classified info Bernie-Hillary echoes seen in Biden-Sanders primary fight Rosenstein on his time in Trump administration: 'We got all the big issues right' MORE and attempting to fire Mueller.

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"There are elements of the report ... about seven or eight things that are left undone, he was not within his purview to investigate, he thought," Biden said of Mueller. "The Congress is attempting to take that up."

"If in fact they block the investigation, they have no alternative but to go to the only other constitutional resort they have, [which] is impeachment," he added. "But my job, in the meantime, is to make sure he's not back as president of the United States."

Biden's call for Congress to begin impeachment proceedings if the White House blocks its investigation falls short of the position of his fellow 2020 primary contender Sen. Kamala HarrisKamala Devi HarrisSanders defends vote against USMCA: 'Not a single damn mention' of climate change The Hill's Morning Report — President Trump on trial Overnight Energy: Schumer votes against USMCA, citing climate impact | Republicans offer details on their environmental proposals | Microsoft aims to be carbon negative by 2030 MORE (D-Calif.), who said at a town hall last week that Congress should begin impeachment proceedings now.

"We have very good reason to believe that there is an investigation that has been conducted which has produced evidence that tells us that this president and his administration engaged in obstruction of justice. I believe Congress should take the steps toward impeachment," she told a CNN town hall in New Hampshire.