Thomas Frank: It's Judgment Day for McCain

Last week, Republican presidential candidate John McCain called for a commission to "find out what went wrong" on Wall Street. It was an excellent suggestion: Public inquiries into Wall Street practices served the country well in the 1930s.

And Mr. McCain has a special advantage to bring to any such investigation -- many of the relevant witnesses are friends or colleagues of his. In fact, he can probably get to the bottom of the whole mess just by cross-examining the people riding on his campaign bus. So the candidate should take a deep breath, remind himself that the country comes first, pull the Straight Talk Express over at a rest stop, whistle up his media pals, and begin.