cross-posted around the blogosphere

Americans appear ready to sweep a lot of Democrats into office on November 4. Not only does Barack Obama maintain a solid lead in the popular vote and electoral vote estimates, several Senate races that appeared safe Republican holds a few months ago are now considered tossups.

Polling is harder to come by in House races, but here too there is scattered evidence of a coming Democratic tsunami. Having already lost three special Congressional elections in red districts this year, House Republicans are now scrambling to defend many entrenched incumbents.

In this diary, I hope to convince you of three things:

1. Some Republicans who never saw it coming are going to be out of a job in two weeks.

On a related note,

2. Even the smartest experts cannot always predict which seats offer the best pickup opportunities.

For that reason,

3. Activists should put resources behind many under-funded challengers now, instead of going all in for a handful of Democratic candidates.

Much more is after the jump.