The White Home press secretary dismisses new proof tying a Giuliani affiliate to the Ukraine affair.

The White Home press secretary, Stephanie Grisham, tried to dismiss the stream of new details rising about President Trump’s stress marketing campaign on Ukraine by way of Lev Parnas, an affiliate of the president’s private lawyer, Rudolph W. Giuliani.

“We’re not too involved about it. As soon as once more, we all know that all the things within the Senate goes to be honest,” Ms. Grisham advised Fox Information on Thursday. “It’s unlucky that he’s now making a media tour out with numerous the retailers which are in opposition to the president. I believe that reveals precisely what he’s doing.”

Ms. Grisham additionally criticized the Home impeachment proceedings and stated the White Home anticipated that Mr. Trump’s formal response to the fees would show he did nothing mistaken.

Even because the trial was about to start, lawmakers on either side of the Capitol had been once more wading on Thursday via a trove of newly launched textual content messages, voice mail messages, calendar entries and different information associated to a marketing campaign to stress Ukraine to research Mr. Trump’s political rivals.

The proof, handed over by Lev Parnas, provides important new element to the general public file about how the stress marketing campaign undergirding the House impeachment charges performed out and who knew about it. On Wednesday, Mr. Parnas also told The New York Times that he believed Mr. Trump knew that he and Rudolph W. Giuliani, the president’s private lawyer, had been working to dig up filth on his political rivals.

The Home managers may attempt to weaponize items of the fabric as soon as the trial begins, however for now, they hoped the gusher of data would improve stress on Senate Republicans to comply with name witnesses and accumulate new proof in the course of the trial.

Historical past will probably be made swiftly on Thursday, because the Senate initiates solely the third presidential impeachment trial in American historical past in three hours or much less. The occasions start at midday, and senators could also be on airplanes out of city earlier than enterprise hours are over.

Here’s a run-down of the day’s proceedings, based mostly on steerage from Senate officers:

• Earlier than the impeachment trial will get underway, the Senate has some large unfinished enterprise to wrap up. Round 11 a.m. Japanese, senators are anticipated to vote to approve Mr. Trump’s long-sought trade agreement with Canada and Mexico.

• At midday, the newly appointed Home managers will assemble on their facet of the Capitol and course of for a second consecutive day to the Senate chamber. This time, they may enter with the intention of exhibiting their articles and being launched to senators. This entails studying the articles out loud, in full, as all 100 senators sit quietly at their desks listening.

• The Senate plans to recess every time the Home managers are performed with their presentation. Each events will retreat to their common luncheons to debate technique for the approaching trial.

• Chief Justice John G. Roberts Jr. will probably be escorted into the Senate chamber round 2 p.m. to preside over the trial. Senator Charles E. Grassley of Iowa, the Senate president professional tempore, will swear the chief justice in. His first activity is to manage an oath to all senators, who should swear to do “neutral justice.” Senators will reply orally, however they have to every signal an oath e-book to take a seat in trial.

• In some unspecified time in the future thereafter, the Senate will challenge a summons to Mr. Trump informing him of its trial and demanding he reply to the fees, which is able to almost definitely be delivered in writing. They will even assign written trial briefs to the Home managers and the president’s authorized groups to be submitted subsequent week.

• With that, the Senate will recess the trial till Tuesday, Jan. 21, to offer lawmakers one final lengthy weekend break.