Moulton enters 2020 White House race

Rep. Seth MoultonSeth MoultonHow lawmakers aided the Afghan evacuation GOP lawmaker says he did not threaten US Embassy staff in Tajikistan House panel approves B boost for defense budget MORE (D-Mass.) announced his 2020 presidential campaign early Monday, becoming the 20th candidate seeking the Democratic nomination.

Moulton, who emerged a leader of the Democrats challenging Rep. Nancy PelosiNancy PelosiOvernight On The Money — Senate Democrats lay out their tax plans Democrats haggle as deal comes into focus Dem hopes for infrastructure vote hit brick wall MORE's (D-Calif.) path to the Speakership last fall, said in a video that he is running because "we have to beat Donald TrumpDonald TrumpJan. 6 panel plans to subpoena Trump lawyer who advised on how to overturn election Texans chairman apologizes for 'China virus' remark Biden invokes Trump in bid to boost McAuliffe ahead of Election Day MORE, and I want us to beat Donald Trump because I love this country."

The former Marine's campaign platform includes a focus on gun control, national security and addressing climate change.

“Decades of division and corruption have broken our democracy and robbed Americans of their voice,” Moulton said in his announcement video. "It's all led to an administration that's turned away from our values and is shredding our moral authority.”

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According to his campaign website, the three-term congressman will travel to the early nominating states of New Hampshire, South Carolina and Iowa this week.

Moulton, 40, has said for months that he was considering a 2020 run.

He told ABC News early Monday that Democrats have ceded issues such as patriotism, security and service to Republicans “for too long.”

“This is actually where Donald Trump is weakest,” he said. “We’ve got to take him on on these issues.”

“Seth Moulton is a Massachusetts liberal who supports higher taxes and the socialist Green New Deal," Republican National Committee spokesman Michael Ahrens said in a statement. "His presidential bid is going nowhere, just like his unsuccessful business career and his repeated failed attempts to challenge the least popular politician in DC: Nancy Pelosi."

Moulton joins a crowded field of Democratic nominees including Sens. Elizabeth WarrenElizabeth WarrenSenate Democrats propose corporate minimum tax for spending package The Hill's Morning Report - Presented by Facebook - Budget negotiators: 72 hours and counting Democrats face critical 72 hours MORE (D-Mass.), Kamala HarrisKamala HarrisRNC targets McAuliffe, Biden campaign event with mobile billboard Obama looks to give new momentum to McAuliffe Kamala Harris engages with heckler during New York speech MORE (D-Calif.) and Bernie SandersBernie SandersOvernight On The Money — Senate Democrats lay out their tax plans Overnight Health Care — Presented by Altria — FDA advisers endorse Pfizer vaccine for kids Manchin: 'I think we'll get a framework' deal MORE (I-Vt.) and former Rep. Beto O'RourkeBeto O'RourkeSupport for governors sliding in states without vaccine mandates: survey Abbott bans vaccine mandates from any 'entity in Texas' Abbott disapproval rating up 8 points to 59 percent in San Antonio area: poll MORE (D-Texas).

Other veterans in the 2020 Democratic field include South Bend, Ind., Mayor Pete ButtigiegPete ButtigiegThe Hill's Morning Report - Presented by Facebook - Biden, Democrats inch closer to legislative deal Republican spin on Biden is off the mark Unanswered questions remain for Buttigieg, Biden on supply chain catastrophe MORE and Rep. Tulsi GabbardTulsi GabbardThe perfect Democratic running mate for DeSantis? Progressives breathe sigh of relief after Afghan withdrawal Hillicon Valley: US has made progress on cyber but more needed, report says | Democrat urges changes for 'problematic' crypto language in infrastructure bill | Facebook may be forced to unwind Giphy acquisition MORE (D-Hawaii).

CNN is reporting that former Vice President Joe BidenJoe BidenBiden invokes Trump in bid to boost McAuliffe ahead of Election Day Business lobby calls for administration to 'pump the brakes' on vaccine mandate Overnight Defense & National Security — Presented by Boeing — Afghanistan reckoning shows no signs of stopping MORE will enter the race this week.

— Owen Daugherty contributed to this report, which was updated at 10:23 a.m.