The Republican governor informed donors of his decision in a letter obtained by the Arizona Republic. He wrote that he was “honored by the confidence and interest you’ve shown in my public career” but said that his mind was set.

Ducey’s letter effectively clears the way for his donors to throw their financial support behind an alternative candidate in the race for Democratic Senator Mark Kelly’s seat. Kelly is running for reelection in the race, which could be key in determining whether Democrats or Republicans gain a majority in the Senate, currently split 50-50 along party lines.

Arizona’s next gubernatorial election is scheduled to take place in November, but the incumbent Ducey can’t run because of the state’s two-term limit for the position.

Ducey said in the letter obtained by the Republic that he currently has the job that he wants, and “my intention is to close my years of service to Arizona with a very productive final legislative session AND to help elect Republican governors across the country in my role as chairman of the Republican Governors Association.”

“These are tasks I’ve committed to, and I’m going to dedicate 100 percent of my energy to fulfilling the commitments I’ve made, both to the citizens of Arizona and to my colleagues at the RGA,” the letter read.

Ducey wrote that he and his wife, Angela Ducey, will decide the next steps after his gubernatorial term comes to a close.

Ducey assured his donors in the letter that he is “fully committed” to helping get a Republican elected to the U.S Senate in Arizona. He said that there was a strong pool of candidates for the seat and that he will be “actively supporting our nominee—and perhaps weighing in before the primary.”

The U.S. Senate primary election in the state is scheduled for August 2, and the general election is scheduled for November 8, the Arizona Republic reported.

Kelly is currently the only declared Democratic candidate in the race, but several Republicans are vying for the seat, according to Ballotpedia, a nonprofit site that tracks elections and other political developments in the U .S.

The GOP candidates include Arizona Attorney General Mark Brnovich, who lists issues like border security and election integrity on his campaign website.

Jim Lamon, the founder and chairman of Arizona solar power company Depcom Power, is also running. He also lists election integrity and border security among his priorities on his website, as well as goals to eliminate critical race theory and stop the “Defund the Police” movement.

Newsweek has reached out to a McConnell spokesperson for comment.

Update 03/03/22, 1:10 p.m. ET: This story was updated with additional information and background.