**Neither I nor my wife will vote for either candidate for the US senate this election.**
Please rethink your position -- you are basically giving two votes to the leftist, Obama, if you do not cast your two votes for Keyes.
(Yes, I live in Oregon, but things here are changing slowly -- due to the fact that many people cast their ONE conservative vote!!!!!)
As a libertarian, I have grappled with this issue for a long time. In 2000, against the grain, I voted for Bush for a couple of important reasons. Rather than say that you are 'giving votes' to the other person, I think of it as 'failing to cancel a vote for the other person'. Makes voting for someone that you otherwise would not vote for a bit more palatable.