North Carolina could decide both the presidency and control of the Senate, so it’s a good thing that it counts its vote quickly on election night.

It might need to count all of them before we know the results up and down the ballot. It’s that close.

Hillary Clinton and Donald J. Trump are tied in the state, 44 percent to 44 percent, in the final New York Times Upshot/Siena College survey released Monday.

The Republican senator Richard Burr narrowly leads his Democratic challenger, Deborah Ross, 46 percent to 45 percent.