Mitt Romney Beats Rick Santorum by 13 Percent in Arizona Poll

Mitt Romney has built a solid lead over Rick Santorum in Arizona, which holds its primary on Tuesday, according to a poll released by Rasmussen Reports on Friday.

The poll of likely primary voters has Romney taking 42 percent while Santorum places second with 29 percent. Newt Gingrich garners 16 percent while Ron Paul lags in single digits with 8 percent. One percent back other candidates. According to the poll, there are not enough undecided voters for Santorum to catch up -- only 3 percent of those surveyed are undecided.

The poll of 750 likely Republican primary voters was taken on Feb. 23 and had a margin of error of +/- 4 percent.