Romney Wins Michigan & Arizona

Mitt Romney won the Michigan and Arizona primaries Tuesday, giving his campaign a much-needed boost and disappointing supporters of Rick Santorum who had hoped their candidate could prevail in Mr. Romney's native state of Michigan.

The former Massachusetts governor had been widely expected to win Arizona. Michigan was the fiercer battleground, and a Santorum victory there would have helped him offset Mr. Romney's advantages in money, organization and experience.

But Mr. Romney managed a narrow win in his native state, where his father was governor. The victory could give Mr. Romney momentum, though it might not dispel doubts about his ability to unify the party.

With 87% of Michigan's precincts reporting, Mr. Romney had 41% of the vote to Mr. Santorum's 38%. Texas Rep. Ron Paul had 12%, and former House Speaker Newt Gingrich had 7%.

In Arizona, with 62% of precincts reporting, Mr. Romney had 48% to Mr. Santorum's 26%. Mr. Gingrich had 16%, while Mr. Paul had 8%.  (Continues here)