More Americans now say they are "pro-life" than "pro-choice," according to a Gallup poll released Friday. A majority of respondents 51 percent are against the practice of abortion, while 42 percent classified themselves as being pro-choice. "This is the first time a majority of U.S. adults have identified themselves as pro-life since Gallup began asking this question in 1995," said Gallup analyst Lydia Saad.