The basics.

What we’re expecting to see: The conclusion of the House managers’ opening arguments.

When we’re likely to see it: The managers are expected to return to the floor at 1 p.m. as usual, allowing Chief Justice John G. Roberts Jr. to keep his morning schedule in the Supreme Court. The managers will continue to deliver their arguments until the remainder of their allotted 24 hours expires or they decide to wrap up their case.

How to follow it: The New York Times’s congressional team will be following the developments on Capitol Hill and reporters covering the White House will get the latest from Mr. Trump’s defense team. Visit nytimes.com for coverage throughout the day.

What of witnesses?

Republicans seemed largely unmoved on Thursday by calls from Democrats to introduce new witnesses, a move that could significantly lengthen the trial. Despite chatter about a potential “witness trade” deal in which each side could call a number of witnesses of interest, such a deal seemed unlikely.

On the trial’s sidelines, senators have sporadically been making their stances known. Earlier Thursday, Senator Chuck Schumer of New York, the Democratic leader, said he was cautiously optimistic that enough Republicans would join him in voting to call witnesses like John R. Bolton, the former national security adviser, and Mick Mulvaney, the acting White House chief of staff. During a break Wednesday night, Senator Lindsey Graham, Republican of South Carolina, told reporters he would resist pressure from his colleagues to call the whistle-blower or members of the Biden family to testify.

Without witnesses, the impeachment trial could go to a vote and conclude as early as next week.

Looking forward to the weekend.

After a long week, proposals started circulating on Thursday for an abbreviated trial schedule on Saturday, perhaps starting closer to 10 a.m. Under current rules, Mr. Trump’s lawyers would begin at the usual 1 p.m.