Hurricane Florence is expected to be an extremely dangerous major hurricane through Thursday night.
Trump had planned to urge the defeat of Democratic Sen. Claire McCaskill at the rally. He’s backing her Republican challenger, Missouri Attorney General Josh Hawley.
Trump won Missouri by 18 percentage points in 2016. McCaskill is a top target for Republicans seeking to expand the party’s slim 51-49 edge in the U.S. Senate.
She is among 10 Senate Democrats up for re-election this year in states that Trump won.