In Michigan, it's a close race between Rick Santorum and Mitt Romney. Some polls show Santorum slightly in the lead, but Romney is not losing momentum.
"Romney has more money to spend in the campaign and seems to be a little more aggressive in the campaign. I think it's going to be really tight on election day," said political analyst Tom Shields.
Michigan is Romney's home state and some see that as an advantage for him. Even so, Shields says Santorum may stand a better chance with Democrats.
"They [Democrats] would want to elect the weakest Republican in their minds and elect somebody that they think Obama can beat," Shields said.
Experts say that means Romney is out since he's seen as the strongest of the four GOP candidates. As Santorum takes the lead in Michigan, Democrats may just help to give him that extra boost.
"If you can beat Romney in his home state where he was born in Michigan here, you can have a negative effect on his campaign and potentially get him out of the race which is really what I think the Democrats want to do," said Shields.
However, the Michigan Democratic Party says they won't need that help and they're not encouraging such actions.
"We feel that all of these candidates are very weak and we don't have a problem running against any of them," said John Tramontana, spokesperson for the Michigan Democratic Party.
Shields expects 10% of the voters in the upcoming primary to be Democrats and thinks some of them will vote for Romney.
"Some of the moderate Democrats or conservative Democrats would probably feel more comfortable with Gov. Romney as president," said Shields.
Others will vote for Santorum, trying to drag the primary out as long as possible to help President Obama.