President Trump’s efforts to restrict mail voting ahead of the midterms were thwarted by the Supreme Court, but they have sowed confusion and doubt among some voters.
The Federal Reserve is expected to raise interest rates on Wednesday, putting Kevin M. Warsh, the chairman, at odds with the administration just before the midterms.
Mr. Trump called Jensen Huang, Nvidia’s chief executive, while Mr. Huang was onstage in Los Angeles and criticized calls to slow down and regulate A.I.