No surprise here, as Romney captures all of Arizona’s 29 delegates with a big victory.  Still too early to call in Michigan though, where the real story is whether or not Romney can capture his home state over Rick Santorum.

Via Fox News:

Mitt Romney has won the Arizona Republican presidential primary, Fox News projects. 
The Michigan contest, meanwhile, is too close to call as early returns show Romney and Rick Santorum separated by a narrow margin.
With 20 percent of precincts reporting in Michigan, Romney is leading with 41 percent, followed by Santorum with 38 percent. Ron Paul and Newt Gingrich are trailing far behind, though Fox News can project that Paul will take place third and Gingrich will place last in the state. 
With his win in Arizona, the former Massachusetts governor will take all 29 delegates in the winner-take-all state, padding his lead in the national delegate hunt.