CNN HAS BLOCKED FREE REPUBLIC FROM VOTING. But I'll bet they haven't blocked DU ..??
HOWEVER, if you go to another website .. which would be friendly to CNN .. then it will probably allow you to vote.
Laura is in the lead 51% to 49%
Try clearing your internet browser cache before going to CNN so they can't see what site you left to get there, then try voting.
Sounds like a large number of FReepers have spammed their polls and they want less skewed results. Just a guess.