I’ve been following NC elections for over 50 years, and I’ve never known a primary to end in a tie. Under a 1915 law (yes, 1915), if after canvass there is a tie in a multi county Senate race, there is NO recount, instead there is an AUTOMATIC second primary unless one of the two withdraws. If there is a tie in the SECOND primary, the primary is vacated and the party executive committee chooses the winner and is not limited to the tied candidates. GS 163-111