Careful. If you blink, you might miss another GOP congressman announcing plans to retire.

Yesterday it was Reps. Ron Lewis (R-KY) and Kenny Hulshof (R-MO). (Hulshof is not retiring per se, but running for governor.)

Today, it's Rep. Tom Davis (R-VA), who is expected to announce this afternoon that he is not running for re-election.

Davis' departure brings to 28 the number of GOP retirements in advance of this year's election.