Applying pressure on politicians currently in office and supporting third-party candidates don't need to be mutually exclusive. In fact, a number of people in anti-war groups are doing both.

That's great that someone is challenging Emanuel from a more progressive platform, but that doesn't mean that we should let Emanuel off the hook. Hypothetically, even if his challenger wins next year, what about all the Congressional votes between now and then (like the upcoming funding vote)? Having a Green Party congressman in 2009 doesn't help much in regard to stopping war funding in 2007.