A new poll from George Washington University released today found that six in 10 registered voters would not consider voting for either former Governor Jeb Bush or Vice President Joe Biden, a discouraging report for two likely candidates who have yet to officially declare their presidential campaigns.

None of the 11 candidates featured in the poll had more positive than negative numbers in terms of favorability ratings and likely support at the ballot box, though Hillary Clinton came closest to even opposition and support.

Voters were least likely to say they didn't know how they'd vote on Biden, Bush, Clinton, and Rand Paul, while Martin O'Malley and Carly Fiorina generated the most uncertainty thanks to very low name recognition.