Mitt Romney and Rick Santorum are locked in a statistical tie in Michigan, a new NBC News/Marist poll
shows while a separate NBC/Marist survey shows Romney with a big lead in Arizona.
Both states hold Republican presidential primaries on Tuesday.
In Michigan, former Massachusetts Gov. Romney is supported by of 37 percent of likely GOP primary voters. Santorum, the former Pennsylvania senator, gets 35 percent; Texas Rep. Ron Paul has 13 percent and former House Speaker Newt Gingrich has 8 percent, the NBC/Marist survey shows.
In Arizona, Romney has the support of 43 percent of likely GOP primary voters, Santorum gets 27 percent, Gingrich 16 percent and Paul 11 percent.
For November’s general election, President Barack Obama leads Romney in Michigan by nearly 20 points among registered voters, 51 to 33 percent, with 15 percent undecided. Obama leads Paul 53 to 31 percent; he leads Santorum, 55 to 29 percent; and leads Gingrich, 56 to 28 percent, the NBC/Marist survey shows.
In Arizona, where the president's approval rating among registered voters is just 38 percent, Obama trails Romney, 45 to 40 percent; Santorum by 45 to 42 percent; and Paul by 43 to 41 percent. Obama leads Gingrich by 45 to 40 percent.
The Marist College Institute for Public Opinion conducted both surveys. The Michigan survey, conducted Feb. 19-20 of 3,149 registered voters (margin of error of plus-minus 1.8 percentage points) and 715 likely Republican primary voters (plus-minus 3.7 percentage points).
The Arizona survey also was conducted Feb. 19-20 of 2,487 registered voters (plus-minus 2.0 percentage points) and 767 likely GOP primary voters (plus-minus 3.5 percentage points).
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