As week four of the impeachment inquiry into President Trump comes to a close,

here are some news developments to keep you up to speed.

On Wednesday, Michael McKinley, a former senior advisor to Secretary of State Mike Pompeo,

testified to House impeachment investigators. There, he said he quit his job over perceived

mistreatment of U.S. diplomats. He also strongly rebuked Trump's dealings in Ukraine.

Also on the Hill this week, the U.S. Ambassador to the European Union Gordon

Saunland told House impeachment investigators that President Trump outsourced the job of

handling U.S. policy on Ukraine to his personal attorney Rudy Giuliani.

Saunland said that decision made him uncomfortable, but he still carried out the president's wishes.

While Saunland was testifying Thursday afternoon, acting White House Chief of Staff Mick Mulvaney

held a news conference. There Mulvaney acknowledged that the Trump administration held up U.S.

military aid to Ukraine in part because of Trump's request for Ukraine to investigate a democratic

national committee server. People familiar with the president's thinking have told the Washington

Post that Trump has come to suspect the DNC server hacked by Russia in 2016 may have been hidden

in Ukraine. Mulvaney maintained Thursday that Trump's request of Ukraine was unrelated to the

Biden's. Amidst all this, back on Wednesday, Senate Majority Leader Mitch McConnell

told Republican senators in a closed-door lunch to be ready for an impeachment trial of President

Trump as soon as Thanksgiving. McConnell briefed senators via PowerPoint presentation on what exactly

would happen during a Senate trial. And according to reporting that presentation led to Republican

senators, well, asking lots of questions about details of how such an impeachment trial would work.

And as it turns out, we had those questions too. And even though we're not yet at the point

of a Senate impeachment trial, we wanted to figure out what exactly happens if we get there.

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