Mark this day down. Today – last night, actually – the New York Times and Roll Call reported (it's hard to see who was first) what may be the biggest political story of the campaign. How big? John McCain might have to fire his campaign manager. Big enough?

The story is this. The lobbying firm of Rick Davis, the manager, was being paid $15,000 a month by Freddie Mac until last month. That fact is a direct contradiction of words McCain had spoken Sunday night. At that time, responding to a Times story being prepared for Monday's paper revealing that Davis had been the head of a lobbying consortium led by Freddie Mac and Fannie Mae until 2005, McCain said Davis had done no further work for either mortgage giant.

Someone's lying – either Davis to McCain, or McCain to the public. I trust you see the problem here.