In supporting such a rules change, Tribe said, "McConnell was essentially telling Speaker [Nancy] Pelosi, the House and the nation that he intends to do all he can, rules or no rules, to cover up the obviously grave charges against President Trump embodied in the two articles of impeachment voted by the House in December".
In a joint statement, Schiff, Nadler, House Oversight Committee Chairwoman Carolyn Maloney (D-NY) and House Foreign Affairs Committee Chairman Eliot Engel (D-NY) noted on Tuesday that the addition of materials obtained from Parnas and the other classified evidence demonstrates "there is more evidence relevant to the President's scheme, but they have been concealed by the President himself".
Trump is nearly certain to be acquitted in the Republican-controlled Senate, where leaders have disparaged the House impeachment as a flawed attempt to damage the president ahead of the U.S. election in November.
"An impeachment that will last forever", Pelosi said on Wednesday. The caucus made a decision to vote Wednesday to finally hand over the two articles.
Frustrated that by almost all accounts their latest ploy failed - and even exasperated a few Senate Democrats in the process - the speaker and her caucus have shifted to their latest partisan theatrics: the argument that Senate Republicans are now complicit in a "cover-up".
Speaker of the House Nancy Pelosi holds a news conference at the U.S. Capitol, in Washington, on January 14, 2020.
It takes just 51 votes during the impeachment trial to approve rules or call witnesses.
Senate Majority Leader McConnell, R-Ky., said the Senate trial is expected to begin next Tuesday, Jan. 21; Chief Justice John Roberts could swear in 100 USA senators as jurors as early as this week.
The exact ground rules are for Trump's trial remain unclear. Today's vote will set in motion only the third presidential impeachment trial in all of USA history.
"The emphasis is making the strongest possible case to protect and defend our Constitution, to seek the truth for the American people", Pelosi told a news conference.
Senate majority leader Mitch McConnell has said he does not have the votes to simply dismiss the impeachment charges, as the president has suggested, but also has not committed to further testimony. The Democrats just need four Republicans to join them in calling witnesses. Republicans and Democrats are likely to clash over the issue of whether to call new witnesses.
'I have been working for and advocating that we follow that model. And that we have language in the governing [rules] setting up the parameters of the trial that would allow for a vote on whether or not we should have witnesses subpoenaed and documented provided, ' moderate Republican Senator Susan Collins told reporters Monday evening.
These new materials show exactly why we need a fair trial - with documents and witnesses. They are considering whether to allow a vote on such a motion to dismiss and another to subpoena testimony from new witnesses.
Senator Rand Paul warned his colleagues that they can't be selective on witnesses if they approve to hear from them.
'I'm not going to be voting for witnesses prior to the opening arguments. Almost $400 million USA in Pentagon-approved aid to Ukraine, which is fending off Russian military aggression in the east, was held up for several weeks, until a whistleblower complaint about the Trump-Zelensky call became public knowledge.
The White House is also preparing its defense of Trump with White House Counsel Pat Cipollone and Trump's personal lawyer Jay Sekulow expected to hold speaking roles in the trial.
Trump would nearly certainly veto a measure that clips his powers to take military action, and there likely are not sufficient votes in Congress to overcome a veto. The motion would require 51 votes and, if passed, would end the trial.
With the addition of Collins and three other Republicans, Democrats say they have enough votes to pass the war powers resolution in the Senate.