Republican US presidential candidate Rick Santorum is essentially tied with rival Mitt Romney in Arizona, according to an opinion poll released on Tuesday that points to another possible surprise in the topsy-turvy nominating race.
The Time/CNN poll found Romney ahead of Santorum 36 percent to 32 percent, a lead that is within the 4.5 percentage point margin of error.
Romney had led previous polls by double-digit margins, and Santorum has put little effort into winning Arizona's Feb. 28 primary.
Former House of Representatives Speaker Newt Gingrich won the support of 18 percent, while Texas Representative Ron Paul was at 6 percent.
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