House Democrats are hearing more calls from their constituents back home to move forward on impeaching President Trump Donald John TrumpBiden on Trump's refusal to commit to peaceful transfer of power: 'What country are we in?' Romney: 'Unthinkable and unacceptable' to not commit to peaceful transition of power Two Louisville police officers shot amid Breonna Taylor grand jury protests MORE, adding to the pressure as they return to Washington this week.

While many Democrats have long insisted that voters at town halls would rather talk about kitchen table issues than 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's probe, that began to change this week as the number of lawmakers endorsing impeachment climbed to at least 50.

The pressure began to extend to some swing districts, where constituents pressed Democratic members such as Reps. Ann Kirkpatrick Ann KirkpatrickArizona Rep. Tom O'Halleran wins Democratic primary Arizona Rep. Ann Kirkpatrick wins Democratic primary Cook shifts 20 House districts toward Democrats MORE (Ariz.) and Donna Shalala Donna Edna ShalalaShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' Hillicon Valley: Dems seek to expand DHS probe after whistleblower complaint | DHS rejects House subpoena for Wolf to testify | Facebook rolls out new features for college students Democrats call for narrowing digital divide to help students during pandemic MORE (Fla.) to move ahead with impeachment proceedings.

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Rep. Madeleine Dean Madeleine DeanEyes turn to Ocasio-Cortez as she seeks to boost Biden Democrats blister Barr during tense hearing Democratic lawmakers launch 'Mean Girls'-inspired initiative to promote face masks MORE (D-Pa.), a Judiciary Committee member who backs launching an impeachment inquiry, said the widespread support from her constituents at a Wednesday town hall "is a shift" from even a month ago.

House Democrats' district town halls during the Memorial Day recess came as Mueller made his first public appearance to reiterate the findings in his report about Russia's election interference and Trump’s efforts to obstruct the investigation. More than a dozen Democrats subsequently jumped on the impeachment train, citing Mueller’s assertion that “if we had had confidence that the president clearly did not commit a crime, we would have said so.”

But even before that, the number of Democrats endorsing an impeachment inquiry began to swell a week earlier after Rep. Justin Amash Justin AmashInternal Democratic poll shows tight race in contest to replace Amash Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill On The Trail: How Nancy Pelosi could improbably become president MORE (Mich.) became the first congressional Republican to declare that Trump engaged in impeachable conduct and former White House counsel Don McGahn rebuffed Judiciary Committee Democrats' demands to appear for a hearing.

All together, that deepened the agitation for Democrats to take action despite leadership’s resistance to impeachment.

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Nearly all the Democrats calling for an impeachment inquiry — with the exception of freshman Rep. Tom Malinowski Thomas (Tom) MalinowskiDCCC reserves new ad buys in competitive districts, adds new members to 'Red to Blue' program The Hill's Morning Report - Presented by Facebook - First lady casts Trump as fighter for the 'forgotten' Hillicon Valley: Lawmakers introduce resolution condemning QAnon | US Cyber Command leader vows to 'defend forward' in protecting nation from cyberattacks MORE (N.J.) — hail from safe blue districts. But the impeachment talk is starting to raise its head across the country, even if swing-district lawmakers largely aren’t ready to get on board yet.

Kirkpatrick acknowledged to the audience at her town hall — just hours after Mueller made his statement on Wednesday — that the phones in her offices were “ringing off the hook.” A spokeswoman said that the Arizona Democrat has faced “occasional” questions about impeachment over the past few months but until now hadn’t held a town hall where she was grilled on the subject.

“When Congress assembles the facts regarding the president’s abuse of power and attempts to obstruct justice, we may have the evidence needed to draw up articles of impeachment,” Kirkpatrick said at the town hall.

But one man in the audience questioned why Mueller’s findings on obstruction of justice weren’t sufficient evidence for impeachment on its own.

“I think it is,” Kirkpatrick replied. But she maintained that Democrats need to keep investigating and build more consensus before proceeding. “I know it’s a little frustrating because people want something to happen right away.”

Before taking questions at her town hall, Shalala outlined the bills House Democrats have been passing from their policy agenda. “If you read the papers, you'd think all we're doing is debating impeachment or something,” she said.

But the first constituent question was about impeachment.

“I understand what you guys are doing with these bills, and that's great. But you can't fix the roof if the house is on fire. So it's not acceptable that we're ignoring this,” the constituent told Shalala in impassioned remarks.

Shalala replied that Democrats need to have Mueller testify before Congress to better explain the report’s conclusions to the public because she thinks it’s unlikely most people have actually read the full 448-page report.

“We have to lay out the evidence,” she said.

Shalala told The Hill that it was the first time in the eight town halls she’s held so far this year that a constituent brought up impeachment.

Notably, no one else at the town hall followed up on the topic, instead asking about issues such as health care, affordable housing and immigration.

“In fact, I was surprised it wasn't brought up more than it was,” Shalala said in an interview, noting that she’s heard a lot more about impeachment from her friends and at a fundraiser she attended in New York over the recess.

“It's not that people aren't watching. It's just that there are other issues that they're really concerned about,” Shalala said.

But at a joint town hall held by Democratic Texas Reps. Colin Allred and Marc Veasey Marc Allison VeaseyJoaquin Castro questions whether postal workers broke federal law by hiding mail Chinese tech giants caught up in rising US-China tensions House members race to prepare for first-ever remote votes MORE, a moderator compiled several questions from attendees about where they stood on impeachment.

Allred, like Kirkpatrick and Shalala, represents a district that Hillary Clinton Hillary Diane Rodham ClintonDemocratic groups using Bloomberg money to launch M in Spanish language ads in Florida The Hill's Campaign Report: Presidential polls tighten weeks out from Election Day More than 50 Latino faith leaders endorse Biden MORE carried in 2016 but had been held by Republicans until last November. He and Veasey both agreed that Congress should keep investigating before advancing to impeachment.

“I know that there are a lot of my constituents, a lot of my friends even, who disagree with me about that,” Allred said.

Still, for all the impeachment rage boiling over in the bluest parts of the country, it’s moving more slowly in Trump country.

Freshman Democrats in districts where Trump won in 2016 either heard no questions at all about impeachment or didn’t face pushback for defending a go-slow stance.

Impeachment didn’t come up once at town halls held by Democratic Reps. Angie Craig (Minn.) and Elaine Luria Elaine Goodman LuriaKate Schroder in Ohio among Democratic challengers squelching GOP hopes for the House Congress must finish work on popular conservation bill before time runs out Virginians wait up to four hours to cast early voting ballots MORE (Va.).

And Rep. Antonio DelgadoAntonio Ramon DelgadoGOP leader says he doesn't want Chamber's endorsement: 'They have sold out' US Chamber of Commerce set to endorse 23 House freshman Democrats Democrats go big on diversity with new House recruits MORE (D-N.Y.) drew some applause at his town hall, which took place before Mueller’s statement, for echoing Democratic leaders’ preference to stay the course with more investigations.

"I did not run ... to impeach the president," Delgado said, according to the Daily Freeman. "There is a process here, and that process needs to unfold."

Dean, meanwhile, said she’s seeing an uptick in support for impeachment among her constituents even in her solidly blue district, even as her Wednesday town hall attendees asked about topics than included health care, climate change, gun violence and infrastructure.

"There's been a shift in the conversation in my community in my district," Dean told MSNBC’s "Meet the Press Daily." "The room mostly — I would say 99 percent of the room — applauded in terms of impeachment inquiry. They absolutely did. That is a shift from four or five or six weeks ago."

At her town hall, Dean appeared to express surprise when impeachment was one of the first few questions.

"I actually wondered whether anybody would bring it up," Dean said.

The audience laughed.

Erika Gebhardt and Brittany Slaughter contributed.