Rick Santorum is looking for another upset while Mitt Romney is hoping to keep his leading rival at bay as they prepare for the 20th debate of the race for the Republican presidential nomination.
Santorum arrived ahead of any of his rivals for pre-debate campaigning in Arizona, a state that has long been assumed safe for
Polls have long shown Romney with a solid lead in Arizona, where
all 29 delegates at stake are reserved for the top vote-getter in the primary. None of the candidates has devoted much time to the state, and television ads have been scarce.
In Michigan, on the other hand, Romney, Santorum and their
allies have poured money into television ads.
Both Arizona and Michigan hold primaries on Feb. 28.