As Super Tuesday looms, Republican primary heads into potentially decisive phase

By Aaron Blake – Starting with the Michigan and Arizona primaries on Tuesday, Republican front-runners Mitt Romney and Rick Santorum will face each other in a series of one-on-one matchups that are likely to determine the direction of the rest of the race for their party’s presidential nomination.

“Next Tuesday’s election is pivotal for Mitt Romney,” said GOP consultant Mike Dennehy....