John McCain's campaign is in crisis. The Republican presidential candidate must quickly reverse recent sharp declines and recapture the momentum in this election race if he is to avoid falling fatally far behind Barack Obama, his Democratic opponent. Provided the 12-figure rescue package agreed to over the weekend makes it through the House of Representatives and the Senate, and quickly, the financial emergency may recede a bit as the overriding issue of this election campaign, although it will never be far from voters' minds. Wall Street's distress poses an existential (this election's favourite buzzword) threat to Mr. McCain's campaign. Six...