Rep. Seth Moulton Seth MoultonThe Hill's Morning Report - Presented by Facebook - Markey defeats Kennedy; Trump lauds America's enforcers in Wisconsin Moulton fends off primary challenges in Massachusetts Portland: The Pentagon should step up or pipe down MORE (D-Mass.), who ended his own short-lived presidential campaign last August, formally endorsed former Vice President Joe Biden Joe BidenMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE's 2020 White House bid on Monday, The Wall Street Journal reported.

Moulton said he chose Biden because he trusts the former vice president to unite the party.

“The most important task for Democrats in 2020 is to get Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE out of the White House and Vice President Biden is the best candidate to do that,” Moulton told the Journal “Biden has the most experience and the widest appeal to the broadest swath of voters in the places we need to win this November.”

ADVERTISEMENT

Moulton also said that Biden "can bring together the Democratic Party’s winning coalition from the Obama years.”

“He can also appeal to moderates, independents and Republicans who are disillusioned with Trump’s behavior,” he added.

The Massachusetts representative, who has been in office since 2015, also pointed to Biden's foreign policy experience.

"In this complicated time at home and around the world, Joe Biden has the experience and judgment not just to win in November, but to lead our nation after he does—by fighting for opportunity, equality, and security like he’s done his whole career," he said in a statement to The Hill.

Moulton said in his statement to The Hill that Biden was the first person to hold a rally for him during his campaign for Congress. He said he will go to Iowa and New Hampshire to campaign for Biden ahead of voting in both states next month.

ADVERTISEMENT

Polling trends in recent days show a tightening race between Biden and Sen. Bernie Sanders Bernie SandersNYT editorial board remembers Ginsburg: She 'will forever have two legacies' Two GOP governors urge Republicans to hold off on Supreme Court nominee Sanders knocks McConnell: He's going against Ginsburg's 'dying wishes' MORE (I-Vt.) in Iowa ahead of the next week's caucuses. But polls in New Hampshire have shown a stronger Sanders lead.

Recent polls have shown Biden, Sanders and Sen. Elizabeth Warren Elizabeth WarrenBiden's fiscal program: What is the likely market impact? Warren, Schumer introduce plan for next president to cancel ,000 in student debt The Hill's 12:30 Report - Presented by Facebook - Don't expect a government check anytime soon MORE (D-Mass.) pulling away in Super Tuesday states, making the early votes in Iowa and New Hampshire a crucial chance for the campaigns to try and build momentum.

Moulton added that Biden gets his vote as the best candidate and that he thinks the former vice president has been the most consistent front-runner.