(LOS ANGELES TIMES) — A fierce Michigan primary battle with the potential to upend the Republican presidential contest is going down to the wire as a virtual dead heat, according to a new statewide poll out Monday morning.

The survey shows Rick Santorum with a statistically insignificant two percentage point lead over Mitt Romney heading into Tuesday’s primary.  What is significant, however, is that Romney does not appear to have pulled away from his main rival in a must-win state for him.

Over the past week, Santorum had seemed to be slipping behind, particularly after a middling debate performance on Wednesday.  However, that event—which took place in Arizona, this week’s other primary state—did not appear to receive the same degree of attention from voters, and especially the local news media in Michigan, as earlier debates in other primary and caucus states.

Both men have been waging aggressive, in-person efforts in Michigan, capped by a full day of campaigning across the state on Monday.

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