Instead of worrying about RINOs, Republicans need to start playing hardball with congressional (mainly senatorial) "blue-dog" DINOs, who get a free pass. Republican leaders praise them when they vote the right way, and refuse to run vigorous campaigns with serious alternative candidates against them. If the Republicans had the seats currently held by the Mary Landrieus, Zell Millers, and John Breauxs of the world, they could afford to lay down the law on party unity to guys like Chris Shays.