Gallup began asking Americans to define themselves as pro-choice or pro-life on abortion in 1995, and since then, identification with the labels has shifted from a wide lead for the pro-choice position in the mid-1990s, to a generally narrower lead for "pro-choice" -- from 1998 through 2008 -- to a close division between the two positions since 2009. However, in the last period, Gallup has found the pro-life position significantly ahead on two occasions, once in May 2009 and again today. It remains to be seen whether the pro-life spike found this month proves temporary, as it did in 2009, or is sustained for some period.