The past few months I've tried to defend Bill and Hillary Clinton against some of the more unreasonable attacks from their critics. Just last weekend on CNN's Ballot Bowl, I defended Bill Clinton when critics accused of him of questioning Barack Obama's patriotism. The critics may have misinterpreted Clinton's remarks, I said, giving the former president the benefit of the doubt.

I've also defended Barack Obama in recent weeks against unreasonable charges directed at him because...