Romney wins Michigan primary
In his victory speech, Romney said the win marked the beginning of a comeback.
Romney desperately needed a victory in the economically ailing Midwest to keep his White House hopes alive.
He had finished second in the first two contests of the Republican race. Supporters hope this home win will re-invigorate his campaign.
The competition for the Republican nomination remains wide open; three different candidates have won the first three significant contests as the race moves on to Nevada.