Both sides dug in Monday in the impasse over a Senate trial of President Trump, with Senate Majority Leader Mitch McConnell (R-Ky.) chiding House Speaker Nancy Pelosi (D-Calif.) for the delay in transmitting articles of impeachment, a position he called “absurd.”

Pelosi, meanwhile, insisted that before moving forward, Democrats need to know “what sort of trial the Senate will conduct.” Democrats are seeking to have several witnesses testify, and Senate Minority Leader Charles E. Schumer (D-N.Y.) pressed his case in a letter to colleagues Monday that documents withheld by the White House be subpoenaed as part of the trial.

At the heart of the Democrats’ case is the allegation that Trump tried to leverage a White House meeting and military aid, sought by Ukraine to combat Russian military aggression, to pressure Ukrainian President Volodymyr Zelensky to launch an investigation of former vice president Joe Biden and his son Hunter Biden, as well as a probe of an unfounded theory that Kyiv conspired with Democrats to interfere in the 2016 presidential election.

●White House official directed hold on Ukraine aid shortly after Trump’s July 25 call with Zelensky.

●After scathing editorial in evangelical magazine, top Trump aide defends president.

●Key Democratic senator remains undecided on whether Trump should be removed from office.