It generally only applies to Senate seats, House seats have been more successful.<quoted text>
1) You aren't a member of the GOP, so you don't count.
2) Look at the results of primaries when <slur>are running. For the most part, the <slur>beats the GOP incumbent, and then loses the general. Don't kid yourself who is driving that party.
Alaska 2010-RINO won write in vote
PA 2010-Ds remove former RINO in primary, conservative wins
Utah 2010-Tea Party defeats RINO, wins general
Indiana 2012-RINO loses renomination, Tea Party loses general, but DINO is elected
You asked for incumbents.
It's worth noticing that RINOs lost elections for Gov in California, Oregon (2010), Washington (2012), for Senate in Massachusetts (2012), Connecticut (2010,2012).
In leftist thought, it's because they were dragged down by the "extremists", but I never recall the media saying that a D lost re-election because of Grayson, Waters, and Rangel.
In Ohio, only elected officials with (R) and precinct committeemen are GOP members. We don't have actual registration, only primary ballots.