Republican presidential candidate Mitt Romney wins contests in Michigan and Arizona. Deborah Lutterbeck reports.
REPORTER: Mitt Romney wins the Republican presidential primary in Michigan, after a tight race with his closest rival, Rick Santorum.
MITT ROMNEY: "Thank you Michigan what a win this is a big night."
REPORTER: Romney also won the day's other primary in Arizona. It was a hard fought victory for Romney, in the state where he was born and raised and where his father was a popular governor in the 1960s.
MITT ROMNEY: "We did not win by a lot, but we won by enough; and that's what counts."
REPORTER: Former Pennsylvania Senator Rick Santorum came in second, but he is not giving up the fight.
RICK SANTORUM: "We came into the backyard of one of our opponents in a race that everyone said just ignore, you have really no chance here. And the people of Michigan looked into the hearts of the candidates, and all I have to say is: I love you back."
REPORTER: The next key test comes next week on "Super Tuesday" when voters go to the polls in 10 states. Deborah Lutterbeck, Reuters.