As in previous Republican presidential campaigns, most Americans (54%) are able to name at least one of the GOP candidates unprompted. However, smaller percentages name the leading candidates than in previous Republican races.

Just 28% name Texas Gov. Rick Perry and 27% name former Massachusetts Gov. Mitt Romney.

At this point in the race four years ago, Rudy Giuliani was far better known; 45% could name the former New York City mayor unprompted. Even more could name the two leading Democratic candidates at the time, Hillary Clinton (78%) and Barack Obama (62%).

Read the full report, GOP Candidates Hardly Household Names, on the Pew Research Center for the People & the Press' Web site.