WASHINGTON--The day before a CNN GOP presidential debate in Mesa, a new CNN/TIME/ORC Arizona poll shows Mitt Romney lost some of his lead and is in a statistical tie with Rick Santorum.

From CNN:

ARIZONA: Romney (36%), Santorum (32%), Gingrich (18%), Paul (6%), None/No One (1%), No Opinion (6%)

34% of respondents said they might change their mind in terms of whether they will definitely support the same candidate. 58% said they would definitely support their current candidate. 8% had no opinion on whether or not they would change their mind.

MORE FROM TIME/ CNN: "Along with a pivotal contest on the same day in Michigan, Arizona's Feb. 28 primary is the first major test of Santorum's staying power since the former Pennsylvania Senator vaulted to the lead in national polls after grabbing a trio of symbolic victories on Feb. 7 in Missouri, Minnesota and Colorado. Like his native state of Michigan, Arizona -- which has the fifth-highest percentage of Mormons in the U.S. -- is considered friendly territory for Romney, who finished second there in 2008 behind the state's senior Senator, John McCain. The former Massachusetts governor has outspent Santorum in Arizona and visited more frequently."