Current Favorablity of 2008 Presidential Candidates

According to a Rasmussen Poll the current American Presidential Candidates have the following favorability ratings:

Rudy Guiliani 70%
Barack Obama 55%
John McCain 54%
Hillary Clinton 50%
John Edwards 49%

This doesn't mean the that voters would vote for the candidates by the same percentages, it is just how they are viewed by the public. However it is interesting to ponder.