Budd's victory - a sign of Trump's continued influence in the party - means he will face Democrat Cheri Beasley, a former state chief justice, in the Nov. 8 congressional election.

The race is crucial to Republican hopes of regaining control of a Senate narrowly held by President Joe Biden's fellow Democrats. Burr is a Republican.

Biden's public approval rating is at 42%, with 50% of Americans disapproving of his performance, according to a Reuters/Ipsos opinion poll completed on Tuesday.

(Writing by Makini Brice; Editing by Will Dunham and Ross Colvin)