The House Judiciary Committee voted along party lines Thursday to broaden the panel’s powers to investigate 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 as Democrats seek to build their case for impeachment — and clean up their oversight message amid a month of mixed signals.

The move does not launch a formal impeachment process, but marks the first time a Democratic panel has voted on language that explicitly lays out how the party’s ongoing investigations into alleged presidential misconduct could lead to drafting — and eventual votes on — impeachment articles.

ADVERTISEMENT

That debate over the status of the Judiciary investigation — is there an impeachment inquiry or is there not? — has dogged Democrats throughout the week, as even top leaders have sent mixed signals about the nature of the probe, muddling the party’s oversight message just as the process is heating up.

Nadler on Thursday both acknowledged the confusion and sought to eliminate it.

“This committee is engaged in an investigation that will allow us to determine whether to recommend articles of impeachment with respect to President Trump,” he said. “Some call this process an impeachment inquiry. Some call it an impeachment investigation. There is no legal difference between these terms, and I no longer care to argue about the nomenclature.”

Republicans pounced on what they called a mixed message coming from across the aisle, saying Democrats are attempting “a charade,” by invoking impeachment to satisfy the party’s liberal base but without voting to launch a formal inquiry, which could hurt vulnerable centrist Democrats at the polls in 2020.

"They know that most Democrats hate this president, and they've decided that he's guilty regardless of what the facts say," said Rep. Steve Chabot Steven (Steve) Joseph ChabotKate Schroder in Ohio among Democratic challengers squelching GOP hopes for the House Centrist Democrats 'strongly considering' discharge petition on GOP PPP bill Lawmakers call for expanded AI role in education, business to remain competitive MORE (R-Ohio). "So instead the committee Democrats feel no choice but to investigate, and investigate, and investigate — until they find something that looks like a crime."

Yet Republicans also appeared to oscillate between claims that Democrats have launched a “faux impeachment” effort and arguments that the procedures vote is an impeachment vote.

“Democrats followed the yellow brick road, and now they’re fully lost in impeachment Oz,” Rep. Doug Collins Douglas (Doug) Allen CollinsDemocrats ramp up pressure on Lieberman to drop out of Georgia Senate race The Hill's Campaign Report: Biden on Trump: 'He'll leave' l GOP laywers brush off Trump's election remarks l Obama's endorsements GOP, Democrats look to galvanize women with SCOTUS fight MORE (R-Ga.), the top Republican on the Judiciary Committee, said. “Try as they might, they can’t find their way out of the mess they’ve made because they think 'words don’t matter.' ”

The procedures adopted in Thursday's vote are designed to expedite the Democrats' probes into the White House by lending investigators more tools to secure documents and witness testimony. One provision empowers committee staff to question witnesses; another allows Nadler to designate any future hearing to be a part of the broader investigation.

Nadler said the new powers constitute “the necessary next step in our investigation of corruption, obstruction, and abuse of power.”

And while Republicans sought to challenge Democrats' procedure resolution by introducing three separate amendments, Democrats swatted them all down during party-line votes.

Still, Democrats remained largely quiet as Republicans monopolized the two hours bashing Democrats' procedures resolution and oversight investigation, with some sources indicating that this was a way to speed up the markup so that members could leave town for the weekend ahead of the third Democratic debate in Houston, Texas. And by doing so, some suggested it also prevented members from further jumbling Democrats' message on impeachment.

Updated at 11:03 a.m.