John McCain, GOP presidential candidate, moments after a supporter asked him a surprising questioned.
See McCain's response.
This week, the world learned that aides to Hillary Clinton planted questions at a campaign rally.
Then video surfaced of a John McCain supporter calling Clinton the "B" word at a campaign event.
John Harris of Politico.com follows the campaign train when it goes off the rails.
On our blog: Video of a John McCain backer asking him, "How do we beat the b****?"