A wave of lawmakers from the state of Washington on Sunday called for an impeachment inquiry against President Trump Donald John TrumpSteele Dossier sub-source was subject of FBI counterintelligence probe Pelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' Trump 'no longer angry' at Romney because of Supreme Court stance MORE, making it so that nearly half of the House Democratic Caucus now supports the move.

The call from the five Washington state Democrats — Reps. Derek Kilmer Derek Christian KilmerPelosi asks panels to draft new COVID-19 relief measure Lawmakers fear voter backlash over failure to reach COVID-19 relief deal Clark rolls out endorsements in assistant Speaker race MORE, Kim Schrier Kimberly (Kim) Merle SchrierPelosi: House will stay in session until agreement is reached on coronavirus relief Washington Rep. Kim Schrier wins primary US ill-prepared for coronavirus-fueled mental health crisis MORE, Suzan DelBene Suzan Kay DelBeneDemocrats say affordable housing would be a top priority in a Biden administration On The Money: McConnell not certain about fifth coronavirus package | States expected to roll out unemployment boost in late August | Navarro blasts 'stupid' Kodak execs On The Money: Economists flabbergasted after Congress leaves with no deal | Markets rise as the economy struggles | Retail sales slow in July MORE and Denny Heck Dennis (Denny) Lynn HeckExclusive: Guccifer 2.0 hacked memos expand on Pennsylvania House races Heck enjoys second political wind Incoming lawmaker feeling a bit overwhelmed MORE as well as Sen. Patty Murray Patricia (Patty) Lynn MurraySenate Democrats introduce legislation to probe politicization of pandemic response Trump health officials grilled over reports of politics in COVID-19 response CDC director pushes back on Caputo claim of 'resistance unit' at agency MORE — came four days after former special counsel Robert Mueller Robert (Bob) MuellerCNN's Toobin warns McCabe is in 'perilous condition' with emboldened Trump CNN anchor rips Trump over Stone while evoking Clinton-Lynch tarmac meeting The Hill's 12:30 Report: New Hampshire fallout MORE testified to Congress.

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Although Mueller revealed little that wasn't already included in his 448-page report on Russian interference in the 2016 election, 11 lawmakers have moved to begin supporting an impeachment inquiry since the testimony.

The investigation did not find sufficient evidence to prove conspiracy between the Trump campaign and Russia during the election, and it neither implicated nor cleared Trump on the question of obstruction of justice.

Trump touted the hearings as a success, declaring the “phony cloud” cast by the investigation had been lifted and insisted “there was no defense to this ridiculous hoax, this witch hunt.”

Over the weekend, however, he took aim at House Oversight and Reform Chairman Elijah Cummings Elijah Eugene CummingsBlack GOP candidate accuses Behar of wearing black face in heated interview Overnight Health Care: US won't join global coronavirus vaccine initiative | Federal panel lays out initial priorities for COVID-19 vaccine distribution | NIH panel: 'Insufficient data' to show treatment touted by Trump works House Oversight Democrats to subpoena AbbVie in drug pricing probe MORE (D-Md.), an African American lawmaker whose committee is conducting several investigations into the Trump administration. Trump's comments about Cummings and the city of Baltimore were widely condemned by Democrats as racist.

Under Cummings, the committee has voted to hold Attorney General William Barr Bill BarrHillicon Valley: Subpoenas for Facebook, Google and Twitter on the cards | Wray rebuffs mail-in voting conspiracies | Reps. raise mass surveillance concerns Bipartisan representatives demand answers on expired surveillance programs YouTube to battle mail-in voting misinformation with info panel on videos MORE and Commerce Secretary Wilbur Ross Wilbur Louis RossTrump admin asks Supreme Court to fast-track excluding people in U.S. illegally from census Trump 'very happy' to allow TikTok to operate in US if security concerns resolved TikTok, WeChat to be banned Sunday from US app stores MORE in contempt for defying subpoenas; heard testimony from former Trump attorney Michael Cohen Michael Dean CohenJudge orders Eric Trump to comply with New York AG's subpoena before Election Day A huge deal for campaign disclosure: Trump's tax records for Biden's medical records Our Constitution is under attack by Attorney General William Barr MORE; held a hearing on conditions at the southern border; and last week authorized a subpoena for official communications from senior White House advisers Ivanka Trump Ivana (Ivanka) Marie TrumpThe Hill's 12:30 Report: Trump stokes fears over November election outcome Special counsel investigating DeVos for potential Hatch Act violation: report Trump, Biden vie for Minnesota MORE and Jared Kushner Jared Corey KushnerAbraham Accords: New hope for peace in Middle East Tenants in Kushner building file lawsuit alleging dangerous living conditions Trump hosts Israel, UAE, Bahrain for historic signing MORE.

It marked the second time in three weeks that Trump targeted a prominent minority Democratic lawmaker and in many ways mirrored the way his attacks on Reps. Alexandria Ocasio-Cortez Alexandria Ocasio-CortezOn The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline McCarthy says there will be a peaceful transition if Biden wins Anxious Democrats amp up pressure for vote on COVID-19 aid MORE (D-N.Y.), Ilhan Omar Ilhan OmarOmar fires back at Trump over rally remarks: 'This is my country' Trump attacks Omar for criticizing US: 'How did you do where you came from?' Democrats scramble on COVID-19 relief amid division, Trump surprise MORE (D-Minn.), Rashida Tlaib Rashida Harbi TlaibTrump attacks Omar for criticizing US: 'How did you do where you came from?' George Conway: 'Trump is like a practical joke that got out of hand' Pelosi endorses Kennedy in Massachusetts Senate primary challenge MORE (D-Minn.) and Ayanna Pressley Ayanna PressleyFauci, Black Lives Matter founders included on Time's 100 Most Influential People list Trump attacks Omar for criticizing US: 'How did you do where you came from?' Pressley applauded on House floor after moving speech on living with alopecia MORE (D-Mass.) played out.

Another key committee leader, House Judiciary Committee Chairman Jerrold Nadler Jerrold (Jerry) Lewis NadlerDemocrats shoot down talk of expanding Supreme Court Schumer: 'Nothing is off the table' if GOP moves forward with Ginsburg replacement Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence MORE (D-N.Y.), on Sunday said that Trump "richly deserves impeachment" but stopped short of joining a growing call for House Democrats to begin a formal inquiry.

"My personal view is that [Trump] richly deserves impeachment. He has done many impeachable offenses. He's violated the laws six ways from Sunday," Nadler said on CNN's "State of the Union."

The four Washington state representatives, who all cited Mueller's report in their statements, bring the total number of House Democrats calling for impeachment proceedings up to 103, just 15 shy of a majority of the House Democratic Caucus.

Murray, the No. 3 Democrat in the Senate, said in a statement that “as we have learned more about the gravity of the potential threats to our democracy identified in Special Counsel Mueller’s report, it has become clear the House should begin proceedings to determine whether the President’s actions necessitate impeachment.”

Democratic leadership has so far been hesitant, instead asking the caucus to focus on investigations and oversight.

House Speaker Nancy Pelosi Nancy PelosiPelosi slams Trump executive order on pre-existing conditions: It 'isn't worth the paper it's signed on' On The Money: Anxious Democrats push for vote on COVID-19 aid | Pelosi, Mnuchin ready to restart talks | Weekly jobless claims increase | Senate treads close to shutdown deadline Trump signs largely symbolic pre-existing conditions order amid lawsuit MORE (Calif.) said Friday that she has no problem with individual Democrats calling for impeachment despite her reservations about moving forward with the process.

"Their advocacy for impeachment only gives me leverage. I have no complaint with what they are doing," she said.