Speaker Nancy Pelosi Nancy PelosiPelosi: Trump Supreme Court pick 'threatens' Affordable Care Act Sunday shows preview: Lawmakers prepare for SCOTUS confirmation hearings before election Will Democrats attempt to pack the Supreme Court again? MORE (D-Calif.) said Thursday that party leaders will apply no pressure on rank-and-file members to support the articles of impeachment against President Trump Donald John TrumpBiden says voters should choose who nominates Supreme Court justice Trump, Biden will not shake hands at first debate due to COVID-19 Pelosi: Trump Supreme Court pick 'threatens' Affordable Care Act MORE that are expected to hit the House floor next week.

While the House Democratic Caucus is overwhelmingly supportive of the impeachment effort, several moderate members are holding out ahead of the votes amid concerns that backing the effort might alienate voters in their battleground districts heading into the 2020 election.

Pelosi maintained on Thursday that the choice is entirely theirs to make.

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"I have no message to them. We are not whipping this legislation, nor would we ever with something like this," Pelosi told reporters in the Capitol. "They'll make their own decisions. I don't say anything to them."

The Democratic leader's remarks came as lawmakers on the House Judiciary Committee on Thursday held a hearing to debate two articles of impeachment against Trump over his dealings with Ukraine: abuse of power and obstruction of Congress.

Democrats had said after unveiling the articles earlier this week that they don't expect more than a couple defections, but the spotlight has shifted to centrist Democrats who are hearing from constituents on both sides of the issue.

The 233-member Democratic caucus has been largely united on impeachment since the inquiry was launched in September.

Even as Pelosi spoke, the House Judiciary Committee was working across the Capitol to mark up two articles of impeachment related to Trump's dealings with Ukraine: one accuses the president of abusing his power in asking Ukrainian leaders to open investigations that might have helped him politically. The other claims he obstructed Congress as Democrats examined his foreign policy in Kyiv.

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The Judiciary panel is expected to pass both articles later Thursday along strict party lines, sending the measures to the full House, which is likely to vote on them next week.

It remains unclear how many centrist Democrats will join Republicans to oppose the effort. Only two in Pelosi's caucus — Reps. Collin Peterson Collin Clark PetersonKate Schroder in Ohio among Democratic challengers squelching GOP hopes for the House The Hill's Campaign Report: 19 years since 9/11 | Dem rival to Marjorie Taylor Greene drops out | Collin Peterson faces fight of his career | Court delivers blow to ex-felon voting rights in Florida Peterson faces fight of his career in deep-red Minnesota district MORE (Minn.) and Jeff Van Drew Jeff Van DrewThe Hill's Campaign Report: 19 years since 9/11 | Dem rival to Marjorie Taylor Greene drops out | Collin Peterson faces fight of his career | Court delivers blow to ex-felon voting rights in Florida The Hill's 12:30 Report: First Kennedy to lose a Massachusetts election Ex-Democrat Van Drew speaks at GOP convention MORE (N.J.) — voted against the rules package governing the impeachment debate, which passed through the House at the end of October.

Van Drew, who's facing a competitive race in 2020, has already said he'll oppose the articles when they hit the floor next week. Not only does Trump's conduct not rise to the level of impeachment, he said Wednesday, but he's also concerned that Trump would use his near-certain acquittal in the Senate as ammunition on the campaign trail next year.

Still, Van Drew acknowledged that the number of Democratic defectors will be far shy of enough to sink resolutions in the House.

"It's going to be a low number, I would imagine," he said. "Maybe three or four — if that."

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Rep. Lucy McBath Lucia (Lucy) Kay McBathThis week: House returns for pre-election sprint House Democrats' campaign arm reserves .6M in ads in competitive districts Black Lives Matter movement to play elevated role at convention MORE (D-Ga.), another freshman facing a tough reelection contest, announced Wednesday night that she'll support the articles, despite the political risks.

"I am greatly saddened by what we have learned, and I am forced to face a solemn conclusion," she said during the first round of the Judiciary Committee's two-day markup of the articles.

Pelosi, who had resisted impeachment for most of the year, shifted gears in late September after allegations from a government whistleblower that Trump had abused his power in asking Ukrainian leaders for a political favor. With that act, she said, Trump gave Congress no choice but to impeach him.

"The fact's are clear — irrefutable, in fact," she said.

Still, she emphasized that the gravity of next weeks votes — which would make Trump just the third president in U.S. history to be impeached — means lawmakers will have to decide for themselves where they'll land.

"I'd rather not ask anybody what their vote is," she said. "People will vote the way they vote."