Two other possible GOP candidates are as familiar to Republicans as these four, but they both have below-average net favorable scores: Florida Gov. Jeb Bush and New Jersey Gov. Chris Christie. Despite Jeb Bush’s staus as the son of a former president and the brother of another, Republicans’ familiarity with him is no higher than any of the other possible candidates tested. Perhaps because some Republicans continue to have less than positive memories of his brother, Bush’s unfavorable rating of 19% is the second highest of any of those tested. Chris Christie has the lowest net favorable (+10) of any candidate tested, with 39% holding a positive opinion and 29% a negative opinion.

Three other candidates have below-average familiarity, Texas Sen. Ted Cruz, Florida Sen. Marco Rubio, and former Pennsylvania Sen. Rick Santorum. Of these, Santorum, a very active candidate for the GOP nomination in 2012, has the lowest net favorable rating.