Mitt Romney was projected the winner in the Arizona primary on Tuesday night by Fox News.
The former Massachusetts governor was favored to come out on top going into the contest and Arizona Gov. Jan Brewer (R) endorsed Romney in the race.
In winning Arizona, Romney secured all of the state's 29 delegates. Voters in Michigan also went to the polls to cast ballots in the state's primary election on Tuesday.
The AP reports:
Exit polling showed a plurality of Republican voters in both Michigan and Arizona saying the most important factor to them in the primaries was that a candidate be able to beat Obama in November. Romney won that group in Michigan, where it mattered most, and also prevailed among voters in the state who said experience was the quality that mattered most.
[Rick] Santorum ran particularly well among voters who cited a desire for strong conservatism or strong moral character.
Former House Speaker Newt Gingrich and U.S. Rep. Ron Paul went into the contests already looking ahead to Super Tuesday.
(From delegates to Twitter followers, click here for a rundown on who's ahead in the primary race.)
Check out the live blog below for the latest developments out of Arizona and Michigan.