From First Read:

Countdown to the Ames Straw Poll: 43 days
Countdown to MA-05 Special Election: 65 days
Countdown to LA GOV election: 113 days
Countdown to Election Day 2007: 130 days
Countdown to LA GOV run-off (if necessary): 141 days
Countdown to Iowa: 209 days
Countdown to Tsunami Tuesday: 220 days
Countdown to Election Day 2008: 494 days
Countdown to Inauguration Day 2009: 571 days