MESA, Ariz. — Arizona Gov. Jan Brewer (R) had been holding out until after the presidential candidates took to the stage in her home state before making an endorsement in the race, but said after the debate she had more deliberating to do.

"I have a lot to digest and absorb, and I will make my decision as soon as possible," Brewer told reporters after a CNN debate.

Brewer said she was ecstatic that the candidates had come to Arizona for what she called a serious and substantive debate.

"I actually thought Mitt Romney did a fantastic job — a lot better than he's done in the past — but I thought they all did very, very well tonight," she said.

Brewer has little time to act if she wants her endorsement to have a serious impact in Arizona. The Grand Canyon State holds its primary on Tuesday — the same day as a contest in Michigan that will be even more closely watched.

An Arizona poll released Tuesday showed that 25 percent of GOP primary voters would be more likely to vote for a candidate if he or she had Brewer's endorsement.