Obstruction of Congress article: They’ll say Trump’s efforts to block witnesses and documents is unprecedented, and point to how Trump blocked all document requests and 12 key witnesses from complying with the House investigation. Meanwhile, President Clinton’s trial included extensive public debate over his alleged crimes and three witness depositions.

“If you don’t believe me, ask Ken Starr. … Ask him how many documents Clinton provided? 90,000. 0 were provided here,” the aide said.

Witnesses: They’ll roll back the game tape from Clinton’s 1999 impeachment trial, and point to Senate Majority Leader Mitch McConnell and Senator Lindsey Graham’s comments in which they pushed to hear from witnesses.

“They’ll also argue that delaying the vote over whether to include witnesses provides unnecessary hurdles for everyone involved, and robs them of any chance to plan in advance: It speaks to the fundamental fairness of the trial, and it is out of sync with precedent, with law, and what the American people want,” the aide said.