Arizona Sen. John McCain, fresh off a losing presidential bid, announced today that he's planning to run for re-election to the Senate in 2010. From the Boston Globe's write-up of McCain's Phoenix press conference:

Asked about getting over a crushing loss, he said "you really have to take an attitude" that it was an honor to run as the GOP nominee and that the American people rendered their verdict.

"We worked hard and inspired a lot of people," he said. "We look back with pride on the campaign we ran."

Politico's Josh Kraushaar notes that the person seen as McCain's greatest competition for re-election has been tapped to serve in the new administration -- Arizona Gov. Janet Napolitano, who will lead the Department of Homeland Security. Others, Kraushaar writes, who could take on McCain include: Phoenix mayor Phil Gordon, Rep. Gabrielle Giffords and Attorney General Terry Goddard.