Outgoing U.S. Senator Bill Frist has made no secret of a possible presidential bid in 2008, but an annual poll by Quinnipiac University in Connecticut says he has a lot of work to do.

Frist, who has already hired staff in the primary battleground state of Iowa, ranked dead last among Republican contenders in Quinnipiac's national survey of registered voters. For better or worse, more than half of the respondents did not know enough about Frist to express an opinion.

The poll was taken from November 13-19, reaching 1,623 voters. It has a margin of error of +/-2.4 percentage points.

Voters were given names of a number of national political figures and asked them to gauge how favorably they viewed the individual. Those scoring high, with favorable ratings between 56 and 64 percent, were former New York Mayor Rudolph Guiliani (R), U.S. Sen. Barack Obama (D), U.S. Sen. John McCain (R), and Secretary of State Condolezza Rice.

At the bottom of the list were U.S. Sen. John Kerry (D), U.S. Sen. Harry Reid (D), Frist, and former Speaker of the House Newt Gingrich (R). Frist was the lowest-ranking Republican with a 41.5 percent rating.

Nashville resident and former Vice President Al Gore, who has said he has no plans to run in 2008, placed in the middle of the pack with a 44.9 percent score.

To see a full copy of the survey, click here.