Around noon Eastern, the seven impeachment managers assigned by the House are expected to read the charges aloud in the Senate chamber. Chief Justice John Roberts, who will preside over the trial, will then administer oaths to all 100 senators binding them to render “impartial justice.” Here’s what to watch for.

What’s next: Senator Mitch McConnell, the majority leader, has indicated that the trial will begin in earnest on Tuesday.

Go deeper: “If recent history is any guide, President Trump’s impeachment trial will be an intensely partisan display that will make the polarization of the Clinton era look like a bygone period of political harmony,” our chief Washington correspondent writes.

Related: Lev Parnas, the businessman who played a central role in the campaign to pressure Ukraine to investigate Mr. Trump’s political rivals, told The Times on Wednesday that the president was fully aware of the effort. Separately, Ukraine’s government said today that a criminal investigation had been opened into whether Mr. Trump’s allies had the U.S. ambassador to the country under surveillance while she was stationed there.