A Democratic lawmaker for Connecticut on Monday said that it would be "an impeachable offense" for President Trump Donald John TrumpFederal prosecutor speaks out, says Barr 'has brought shame' on Justice Dept. Former Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick MORE to discuss former Vice President Joe Biden Joe BidenFormer Pence aide: White House staffers discussed Trump refusing to leave office Progressive group buys domain name of Trump's No. 1 Supreme Court pick Bloomberg rolls out M ad buy to boost Biden in Florida MORE during a phone call with the Ukrainian president.

Rep. Jim Himes James (Jim) Andres HimesMany Democrats want John Bolton's testimony, but Pelosi stays mum SEC's Clayton demurs on firing of Manhattan US attorney he would replace Democrats face tough questions with Bolton MORE said on CNN's "New Day" that Trump is abusing the American public's trust and U.S. resources.

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"I mean, extorting a foreign leader for the purposes of getting that leader to do your political work to try to find dirt on your opponent is extortion," Himes said. "Of course it's an impeachable offense."

Himes also said that the Trump administration is breaking the law by refusing to hand over the whistleblower report — said to be centered on Trump's phone call — to Congress.

"This is all starting to sound a little Nixonian," he said.

The Connecticut representative said he's supported impeachment since he concluded obstruction of justice counts were present in the Mueller report. But he said he thinks new revelations will escalate impeachment talks.

"I can't tell you the House will move into impeachment mode right away, but this really ups the ante," he said.

He added that he does not think Democratic House leaders will take action on impeachment if they think it will diminish the chances of removing Trump from the White House in the 2020 election.

"It is using the assets of the Unites States of America and the public trust for your own... political end," says Rep. Jim Himes about President Trump admitting he discussed former VP Biden in a call with Ukraine's president. "It's an impeachable offense."https://t.co/8ua4vcCzmv pic.twitter.com/F2AzNCaw3M — New Day (@NewDay) September 23, 2019

Speaker Nancy Pelosi Nancy PelosiDemocratic senator to party: 'A little message discipline wouldn't kill us' Overnight Health Care: New wave of COVID-19 cases builds in US | Florida to lift all coronavirus restrictions on restaurants, bars | Trump stirs questions with 0 drug coupon plan Overnight Defense: Appeals court revives House lawsuit against military funding for border wall | Dems push for limits on transferring military gear to police | Lawmakers ask for IG probe into Pentagon's use of COVID-19 funds MORE (D-Calif.) has been cautious on moving forward with impeachment but on Sunday said in a letter that the whistleblower report could prompt a "new stage of the investigation."

The Washington Post has reported the whistleblower report centered on a call between the president and a foreign leader, said to be the president of Ukraine. On Sunday, Trump suggested that he discussed Biden in that call.

Trump has also said he's considering the release of a transcript of the phone call.

There has been no evidence so far to implicate Biden or his son in illegal activities in Ukraine.