WASHINGTON -- The Michigan primary is over, and there's still no clear front-runner from the Republican party.

Mitt Romney was projected as an early winner. He ended up with 39 percent of the vote.

He was followed by John McCain with 30 percent, and Mike Huckabee, who beat Romney in the Iowa caucus, had just 16 percent.

Romney stumbled through the early rounds, but he's still in the competition.

Now, Michigan may well decide whether he stays or goes.

"Washington politicians think of Michigan as the rust belt, but the real rust is in Washington," Romney said.

Exit polls showed the economy is overwhelmingly the top issue in Michigan, and Romney promised to revive it.

"Washington is just fiddling and diddling," Romney said.

With this win in Michigan, Romney may have saved his campaign and jumbled the Republican race more than ever, heading into Florida.

Had McCain won, pollsters said he would have been the clear Republican front-runner, but of course, now he's not.

"It's going to be a really close race. We're happy with really building the support we have in South Carolina, and then we'll be moving on to Florida after that," McCain said.

Either way, voters in Florida will have incredible influence in who gets the nod, and young voters make Florida especially tricky to predict.

"We just want to get out there and live the best life possible for our families and our kids," said Republican Jessica Colon.

Concerns about war tend to drive young Democrats. Concerns about security and taxes tend to drive young Republicans.

But young people don't always vote.

In New Hampshire, young adults loved Obama. That's why polls gave him the inside track and a dramatic lead.

But many of his young supporters didn't show up, and Clinton came out of nowhere for the win.

Those results in New Hampshire, and now Michigan, set up Florida to play the role of king-maker, and it suggests young Florida voters could swing it -- if they turn out.