Republican National Commitee Chairman Reince Priebus has officially launched his reelection campaign, CNN reports.

In his letter to the 168-member committee, Priebus emphasizes his overwhelming support -- a warning for potential rivals. Former Oklahoma Rep. J.C. Watts has suggested he might challenge Priebus, saying the current RNC has not done enough to appeal to minorities.  

"I am formally announcing my campaign for a second term as RNC Chairman today," Priebus writes. "I am humbled to have over 150 members pledge their public endorsement to me for a second term."

Priebus only needs 85 votes to win another term as chairman; an upset is unlikely.