And yet all the Supreme Court positions were filled during the Bush terms. It probably didn't bother anyone because it was after the appointments of Roberts and Alito were confirmed, so it was all theoretical. It might have created more discussion if it was a comment about an actual vacancy of the Court.

Anyway, the GOP needs to be careful. The next Democratic President might nominate Obama for the Court if they push the vacancy into the next term. They might be wishing they had accepted a moderate-left nominee now!