The Texas senator challenged a federal law that put a $250,000 cap on repayments of candidates’ loans to their campaigns using postelection contributions.
The president also signed off on targeting about a dozen Shabab leaders in the war-torn country, from which Donald J. Trump largely withdrew in his final weeks in office.
Chris Van Hollen, a Democrat, said in a statement that there were “no long-term effects or damage,” but that he would be under observation for a few days.
The right-wing firebrand is counting on Republican primary voters to look past his bad press. Opponents are counting on them to lose patience with him.
Interviews show Dr. Mehmet Oz struggling in the G.O.P. Senate primary, despite a Trump endorsement. Voters remain devoted to Donald Trump but seem less swayed by his guidance.
The committee’s subpoenas to five House Republicans underscore the potential importance of their testimony to producing a full account of the effort to overturn the 2020 election.