AZ-Sen: McCain says he'll run for reelection

There's plenty of time to change his mind, but for now, McCain says he's running in 2010 (subscription only):

After much speculation that his failed presidential bid would be his last campaign, Sen. John McCain (R-Ariz.) has decided to run for re-election to his Senate seat in 2010.

McCain, 72, announced the decision during a meeting Tuesday evening with top ally Sen. Lindsey Graham (R-S.C.), advisers Rick Davis, Charlie Black, Carla Eudy and other aides. The meeting, according to a knowledgeable source, took place off the Hill in a private office.

This is a good time to bring this poll back, pitting McCain against Gov. Janet Napolitano:

Research 2000 for Daily Kos. 10/28-30. Likely voters. MoE 4% (No trend lines)

If the 2010 election for U.S. Senate were held today for whom would you vote for if the choices were between Janet Napolitano the Democrat and John McCain the Republican?

McCain (R) 45
Napolitano (D) 53

Assuming Napolitano wins runs, this will be a top-tier battle.