From The Associated Press:
Mitt Romney scored a hard-won, home state triumph in Michigan and powered to victory in Arizona Tuesday night, gaining a two-state primary sweep over Rick Santorum and precious momentum in the most turbulent Republican presidential race in a generation.
Returns from 71 percent of Michigan’s precincts showed Romney at 41 percent and Santorum at 37 percent. Paul was winning 12 percent of the vote to 7 percent for Gingrich.
Romney swept to victory in the Arizona primary. Romney’s Arizona triumph came in a race that was scarcely contested, and he pocketed all of the 29 Republican National Convention delegates at stake.