Republicans, do not read these survey results

Caution: Republicans reading this recent Greenburg-Quinlan-Rosner survey of 49 Republican-held seats may risk exposure to reality.

Dems, enjoy, but use it as a reason to work even harder to avoid snatching defeat from the jaws of victory.

Cover memo here.

View graphs from the poll here.

Complete survey can be read here.

And the list of candidates in the three tiers can be found here.

Thanks to Atrios for the find.