Michael Glassner, Chief Operating Officer of Donald J. Trump for President, Inc., announced the news Monday.
The Trump campaign said last week that he would hold a “Make America Great Again” rally this Friday in Jackson, and that he would speak there for a Republican senator he has already endorsed.
WATCH: Hurricane hunter flies missions to track Hurricane Florence
Cindy Hyde-Smith was appointed to serve temporarily when longtime Republican Sen. Thad Cochran resigned in April. She faces three challengers in a nominally nonpartisan November special election, and the winner will serve the final two years of the six-year term started by Cochran.
The Mississippi race could be important as Republicans try to maintain their slim majority in the Senate.
WATCH: U.S. East Coast braces for impact as Hurricane Florence strengthens