Democratic presidential candidate Hillary Clinton's senior campaign strategist Mark Penn has resigned following reports that his involvement in a public relations firm posed a conflict of interests.

U.S. President George W. Bush will review the credit crunch and global market turmoil with Canadian Prime Minister Stephen Harper and Mexican President Felipe Calderon at a two-day summit that starts on Monday.

A NAFTA superhighway extends North through Texas into Oklahoma and Colorado, and it's a four lane huge superhighway.