LANSING, Mich. — Mitt Romney stood in front of an auto factory in his native Michigan during his 2008 presidential race and vowed to bring back jobs, a popular message that helped give him his first — and only — Republican primary victory.

He could run into a more skeptical reception this week as he makes his first campaign swing through Michigan since officially kicking off his 2012 campaign six days ago. After the election, Romney spoke out forcefully against a federal bailout of General Motors and Chrysler, an initiative that was seen as a matter of life or death for the companies by both parties in Michigan.