June 29 (Bloomberg) -- John McCain, in his sharpest attack yet against rival Barack Obama, said the Democratic presidential candidate's word "cannot be trusted."

Now isn't this pure politics. Here's McCain hiding the fact that his white blood cell count is not good, a perfect sign that cancer is still eating at him, talking about trust. Here's McCain who claims to have been tortured when other POWs, and even his jailer, are saying he was never tortured, talking about trust. Here's McCain who has flip flopped on every issue since becoming the nominee, talking about trust. Here's McCain whose wife even plagiarizes cookie recipes, talking about trust.