Mitt Romney is raising the stakes in Michigan, predicting he cant lose despite trouble in the polls and a surge in support for Rick Santorum.

Asked by on Wednesday whether he might lose the state, Romney said simply: “That won’t happen.”

But Romney has an uphill climb ahead of the vote taking place in the state in less than two weeks, on Feb. 28. In two polls of likely Michigan Republican voters released Monday, Santorum held the lead over Romney.

Michigan is considered a crucial test for Romney’s campaign. Not only does it come one week ahead of Super Tuesday, when many have predicted the GOP nomination will be clinched, but it has long been considered a lock to go for Romney. Michigan is Romney’s home turf — he was born in Detroit and his father was a popular three-term GOP governor — and he won the state in 2008, beating John McCainJohn McCainOvernight Defense: General warns State Department cuts would hurt military | Bergdahl lawyers appeal Trump motion | Senators demand action after nude photo scandal Senate lawmakers eye hearing next week for Air Force secretary: report House Intel chairman under fire from all sides MORE in the GOP primary. 

Santorum winning Michigan would be a serious blow to Romney’s already-faltering status as the Republican Party’s “inevitable nominee.”

Romney has been pushing a line this week that he first previewed Wednesday on Fox News, reminding reporters that his competition in the GOP race has waxed and waned while he has remained the front-runner, for the most part.

“You have seen just how mercurial the sentiments of voters are until they get to know the candidate,” he told reporters, according to “It’s always been a two-person race. First, it was me against Donald TrumpDonald TrumpIntel Dem: Nunes 'sacrificed the good name' of committee with Trump briefing Report: Trump regrets backing health plan before pushing for tax reform Dem rep: 'We must pause the entire Trump agenda' until Russia investigation complete MORE, then it was me against Michele BachmannMichele Bachmann'Real Housewives' producer 'begging' Conway to join cast Ex-rep admires furs amid PETA inaugural gala Why Republicans took aim at an ethics watchdog MORE, me against Newt Gingrich and now it’s me against Rick Santorum.”

Michigan Gov. Rick Snyder (R) endorsed Romney on Thursday, writing in the Detroit News that Romney “understands the challenges confronting Michigan,” though he steered clear of what has become a liability for Romney in the state: his opposition to the auto industry bailout.

Democrats have promoted his position as “kicking” Detroit when it was down, attacking Romney over his position in a new ad released earlier this week.

Romney sought to defend his opposition in an op-ed in the Detroit News on Tuesday.

“The president tells us that without his intervention things in Detroit would be worse,” he wrote. “I believe that without his intervention things there would be better.”