
Mitt Romney, the presumed Republican presidential candidate, speaks during a campaign rally at the Long Family Farm, Orchard, and Cider Mill in Commerce, Mich., Friday. Mr. Romney, who has decried the nasty personal tone of the presidential campaign, seemed to make a joke about President Barack Obama's birth certificate while speaking to voters Friday, re-injecting the issue of the president's birthplace into the campaign.
NEW YORK TIMES

Mitt Romney, the presumptive Republican presidential candidate, and his running mate, Rep. Paul Ryan (R-Wis.), at a campaign event in Powell, Ohio, Aug. 25, 2012. Romney is heading into his nominating convention adopting a more combative footing against President Barack Obama in order to appeal to white, working class voters and convince them he is the best answer to their economic frustrations.
NEW YORK TIMES

Mitt Romney, left, the presumed Republican presidential candidate, his wife, Ann, and his running mate, Rep. Paul Ryan (R-Wis.), right, en route to a rally at the Long Family Farm, Orchard, and Cider Mill in Commerce, Mich., Friday.
NEW YORK TIMES

Mitt Romney, the presumed Republican presidential candidate, and his wife, Ann, stroll outside the Birmingham 8 theater in Birmingham, Mich., Friday.
NEW YORK TIMES

Mitt Romney, the presumed Republican presidential candidate, used a laptop on his campaign plane en route to Columbus, Ohio Friday.
NEW YORK TIMES

Republican presidential candidate, former Massachusetts Gov. Mitt Romney answers a question after landing Saturday in Portsmouth, N.H.
ASSOCIATED PRESS