The surge is especially pronounced in Texas, where voters are deciding closely watched Senate, House and governor's races. More than 6.3 million Texans had voted early as of Wednesday, compared with 4.2 million at the same point four years ago, a 50% increase.

Collins, locked in a tight race with Democratic challenger Troy Jackson, issued a statement saying she'd spoken with Trump's top trade negotiator, Jamieson Greer, and Commerce Secretary Howard Lutnick "about the toll tariffs are taking on Maine families, businesses, farmers, and growers.''