Speaker Nancy Pelosi Nancy PelosiHoyer: House should vote on COVID-19 aid — with or without a bipartisan deal Ruth Bader Ginsburg lies in repose at Supreme Court McCarthy threatens motion to oust Pelosi if she moves forward with impeachment MORE is retaining allies in key corners of the Democratic caucus despite growing calls for 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.

The number of Democrats endorsing an impeachment inquiry more than doubled in the past week, including members of the House Judiciary Committee. But others, representing important caucus factions, are siding with the Speaker's methodical approach.

Here's a look at the key House Democrats who are helping Pelosi hold the line on impeachment.

Zoe Lofgren Zoe Ellen LofgrenBusiness groups start gaming out a Biden administration Top Democrats call for DOJ watchdog to probe Barr over possible 2020 election influence DHS opens probe into allegations at Georgia ICE facility MORE (Calif.)

Lofgren is the second-most senior member of the House Judiciary Committee to live through not just one, but two past impeachment inquiries. She was a staffer during the Nixon years and a member during the Clinton impeachment.

Lofgren also previously challenged House Judiciary Committee Chairman Jerry 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.) for the top spot when it came up for grabs in 2017. While Nadler pushed Democratic leaders in a private meeting to pursue an impeachment inquiry, Lofgren stood up in a closed-door Democratic caucus meeting two days later to push back.

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"Unless we want to have no process whatsoever, which cannot be the case for impeachment, we are going to have to go court, get the subpoenas enforced, get the evidence, get the facts for it and then we will see where we are. I think this just muddies the issue and damages us in many ways as premature," Lofgren warned, according to a source who took notes in the meeting.

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 (Md.)

Cummings is a central figure in Democrats' investigations as the chairman of the House Oversight Committee. And the party's rank-and-file are watching him closely for cues.

Pelosi deployed Cummings, as well as other top committee leaders like Nadler, Ways and Means Chairman Richard Neal Richard Edmund NealAARP endorses Democrats' measure to overturn Trump payroll tax deferral Pelosi, Democrats unveil bills to rein in alleged White House abuses of power Rep. Bill Pascrell named chair of House oversight panel MORE (Mass.), Intelligence Chairman Adam Schiff Adam Bennett SchiffPelosi, Democrats unveil bills to rein in alleged White House abuses of power Chris Matthews ripped for complimenting Trump's 'true presidential behavior' on Ginsburg Trump casts doubt on Ginsburg statement, wonders if it was written by Schiff, Pelosi or Schumer MORE (Calif.) and Financial Services Chairwoman Maxine Waters Maxine Moore WatersPowell, Mnuchin stress limits of current emergency lending programs Pelosi: House will stay in session until agreement is reached on coronavirus relief Omar invokes father's death from coronavirus in reaction to Woodward book MORE (Calif.) during a closed-door meeting this week to give members an overview of their oversight efforts.

Waters, notably, broke with the other committee chairs and reiterated her personal support for impeachment, saying Congress had a “responsibility” to provide a check on the president. But Cummings expressed confidence that Democrats would find success in the courts, citing two favorable rulings in recent days upholding their requests for documents. “I think the courts are saying that we are going to uphold the rule of law,” Cummings told reporters, adding that he’s urging colleagues when they speak to constituents to refer to those rulings. “We've now got two opinions.”

Ro Khanna Rohit (Ro) KhannaThe Hill Interview: Jerry Brown on climate disasters, COVID-19 and Biden's 'Rooseveltian moment' Congress needs to prioritize government digital service delivery DeJoy defends Postal Service changes at combative House hearing MORE (Calif.)

Khanna helped throw Pelosi a lifeline multiple times in recent days even as a string of fellow progressives rushed to endorse starting an impeachment inquiry.

Khanna, who also sits on the Oversight Committee, told Hill.TV that “I'm not there yet. I believe that we need to be methodical, we need to make a case.”

In private, Khanna spoke up during the Democratic caucus meeting to back Pelosi’s position. “My deep fear is, that if we impeach this President, it's going to further tear this country apart, and not let my generation work towards healing the country, something that [former President] Obama did, and that's why I support your views,” Khanna said in remarks addressed to Pelosi, according to a source in the room.

Hakeem Jeffries Hakeem Sekou JeffriesDemocratic leaders: Supreme Court fight is about ObamaCare Pelosi: House will stay in session until agreement is reached on coronavirus relief Races heat up for House leadership posts MORE (N.Y.)

Jeffries, the Democratic caucus chairman, is considered a rising star in the leadership and also sits on the Judiciary Committee.

Jeffries has backed staying the current course despite some fellow Judiciary Committee members jumping on the impeachment train. He’s also one of the only top Pelosi allies tamping down impeachment who actually voted in favor of it in the past. Jeffries supported articles of impeachment from Rep. Al Green Alexander (Al) N. GreenThe Memo: Trump's race tactics fall flat Trump administration ending support for 7 Texas testing sites as coronavirus cases spike The Hill's Coronavirus Report: Miami mayor worries about suicide and domestic violence rise; Trump-governor debate intensifies MORE (D-Texas) on the House floor in January 2018.

“It's clear to anybody who's paying attention, we are in the majority because of two great members like Jason and Elissa and so many others who did not run in on impeachment, did not run on collusion, did not run on obstruction of justice, but ran on making life better for everyday Americans,” Jeffries said at his weekly press conference as swing-district freshman Reps. Jason CrowJason CrowClark rolls out endorsements in assistant Speaker race Trump-Afghan deal passes key deadline, but peace elusive Cook shifts 20 House districts toward Democrats MORE (Colo.) and Elissa Slotkin Elissa SlotkinWray: Racially motivated violent extremism makes up most of FBI's domestic terrorism cases Overnight Defense: House chair announces contempt proceeding against Pompeo | Top general says military has no role in election disputes | Appeal court rejects due process rights for Gitmo detainees Top general: Military will play no role in resolving any electoral dispute MORE (Mich.) stood beside him. “That remains the North Star for the overwhelming majority of the House Democratic Caucus.”

Gerry Connolly Gerald (Gerry) Edward ConnollyJudge issues nationwide injunction against Postal Service changes House panel advances bill to ban Postal Service leaders from holding political positions Shakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' MORE (Va.)

Democratic leadership’s efforts to lower the temperature on impeachment are surely helped by Connolly, a member of the Oversight Committee who routinely appears on television and holds court with reporters in the halls of the Capitol.

Connolly represents a safe blue district in the northern Virginia suburbs just outside of Washington where a minority voted for Trump in 2016, but he isn’t ready to launch an impeachment inquiry.

“I think that has a precedent that troubles me, because I don't think we need to go to a court and say, well, we're going to launch an impeachment investigation that justifies this inquiry,” Connolly told PBS Newshour. Yet Connolly acknowledged that the investigations “may yet lead to an impeachment inquiry because of the facts we uncover. I think we're very close there now. And I think the president is making it a lot harder for those of us who are trying not to cross that line just yet.”

Katie Hill Katherine (Katie) Lauren HillObama counsels NBA players on forming a social justice committee Republicans cast Trump as best choice for women House GOP campaign chairman insists party will win back majority MORE (Calif.)

Hill is a swing-district freshman who sits on the Oversight panel. This week, she argued that launching an "impeachment inquiry" as a legal strategy runs the risk of leading people to believe Democrats are about to vote to impeach Trump.

“I actually think part of the hesitation around doing an impeachment inquiry is that we're already doing this work. We're already doing the job of exposing this to the American people. Does the impeachment inquiry give us any additional leverage in the courts? Not really,” Hill told reporters. “This is why we have to proceed with caution.”

At the same time, Hill acknowledged that she's seen a spike in constituent calls to her office this week urging impeachment. “It's certainly a factor, because it used to be the other way around. We used to have more people saying, 'Don't impeach,’” Hill said.

Other swing-district Democrats are similarly cautious when it comes to impeachment. Fellow freshman Rep. Dean Phillips Dean PhillipsShakespeare Theatre Company goes virtual for 'Will on the Hill...or Won't They?' US Chamber of Commerce set to endorse 23 House freshman Democrats Minnesota Rep. Dean Phillips wins primary MORE (D-Minn.) cited polls showing that the majority of Americans aren’t on board with impeachment. “I'm simply not there yet,” Phillips told MSNBC’s “MTP Daily.” “I want to be cautious and methodical.”

Debbie Dingell Deborah (Debbie) Ann DingellRaces heat up for House leadership posts Michigan Rep. Debbie Dingell easily wins House primary Court orders release of Black Michigan teen who was jailed for missing schoolwork MORE (Mich.)

Dingell helps run House Democrats' messaging arm, which Rep. David Cicilline David Nicola CicillineClark rolls out endorsements in assistant Speaker race Races heat up for House leadership posts The folly of Cicilline's 'Glass-Steagall for Tech' MORE (R.I.) -- a recent impeachment defector -- chairs. Dingell, who’s also a Progressive Caucus vice chair, maintained that Democrats need to stay focused on the policy issues they ran on instead of dividing the country with impeachment. “We gotta lay the groundwork, we gotta do oversight, remember that no one’s above the law, but also do the work that the American people expect us to do,” Dingell told reporters.

And after Trump demanded that Democrats drop their investigations before working on a bipartisan infrastructure bill, Dingell suggested that launching impeachment would only make things worse. "I'm been somebody that's strongly supportive of where Nancy Pelosi has been," Dingell told Fox News's "Outnumbered Overtime." "I think that a divided impeachment would tear this country apart.”