Rep. Paul Ryan, whose Wisconsin district is home to many auto workers, backed a government loan program for auto companies to develop more fuel-efficient cars. (Associated Press)
Rep. Paul Ryan, the Republican vice presidential candidate, greets supporters during a campaign event at the Dallas County Courthouse in Adel, Iowa, on Wednesday, Sept. 5, 2012. (AP Photo/Mary Altaffer)
Rep. Paul Ryan, the Republican vice presidential candidate, speaks during a campaign event at the Dallas County Courthouse in Adel, Iowa, on Wednesday, Sept. 5, 2012. (AP Photo/Mary Altaffer)
Rep. Paul Ryan, the Republican vice presidential candidate, greets supporters during a campaign event at the Dallas County Courthouse in Adel, Iowa, on Wednesday, Sept. 5, 2012. (AP Photo/Mary Altaffer)
**FILE** Republican presidential candidate Mitt Romney speaks Aug. 24, 2012, during a campaign rally with running mate Rep. Paul Ryan (not shown), Wisconsin Republican, in Commerce, Mich. (Associated Press)
Rep. Paul Ryan, the Republican vice presidential nominee, arrives at a campaign event at the Westlake Recreation Center in Westlake, Ohio, on Tuesday, Sept. 4, 2012. (AP Photo/Mary Altaffer)
Republican vice presidential candidate, Rep. Paul Ryan, R-Wis., gives the thumbs up to supporters at a campaign event at East Carolina University, Monday, Sept. 3, 2012, in Greenville, NC. (AP Photo/Sara D. Davis)
Rep. Paul Ryan, the Republican vice presidential candidate, high-fives a football fan during a tailgate party at the Ohio State University-Miami University of Ohio football game on Saturday, Sept. 1, 2012, at Ohio Stadium in Columbus, Ohio. (AP Photo/Mary Altaffer)
Republican presidential nominee Mitt Romney is joined on stage by his running mate, vice-presidential nominee Rep. Paul Ryan, after Romney accepted the nomination of the Republican Party for President of the United States at the Republican National Convention at the Tampa Bay Times Forum in Tampa, Fla. on Thursday, August 30, 2012.
(Rod Lamkey, Jr./ The Washington Times)