FILE - In this Friday, May 4, 2012, file photo Republican presidential candidate, former Massachusetts Gov. Mitt Romney campaigns in Pittsburgh, Pa. Romney has launched an aggressive campaign against President Barack Obama that straddles two sometimes conflicting ideologies. Friday he spoke out against China's "one-child policy" on FOX television, and in the same interview, defended his decision to hire an openly gay staffer, who ultimately quit under pressure from social conservatives. (AP Photo/Jae C. Hong)

Associated Press
FILE - In this Friday, May 4, 2012, file photo Republican presidential candidate, former Massachusetts Gov. Mitt Romney campaigns in Pittsburgh, Pa. Romney has launched an aggressive campaign against President Barack Obama that straddles two sometimes conflicting ideologies. Friday he spoke out against China's "one-child policy" on FOX television, and in the same interview, defended his decision to hire an openly gay staffer, who ultimately quit under pressure from social conservatives.  (AP Photo/Jae C. Hong)
FILE - In this Friday, May 4, 2012, file photo Republican presidential candidate, former Massachusetts Gov. Mitt Romney campaigns in Pittsburgh, Pa. Romney has launched an aggressive campaign against President Barack Obama that straddles two sometimes conflicting ideologies. Friday he spoke out against China's "one-child policy" on FOX television, and in the same interview, defended his decision to hire an openly gay staffer, who ultimately quit under pressure from social conservatives. (AP Photo/Jae C. Hong)