Arizona Rep. John Shadegg, former chairman of the Republican Study Committee and currently chairman of the House Policy Committee, announced today that he will be seeking the post of Majority Leader. A product of the class of ’94, Shadegg has been an effective and respected conservative voice within the GOP Conference and his entry will certainly shake things up immediately.
Shadegg will pull together an interesting coalition that can make him very viable in the contest, even 
with the late entry. As an active and trusted conservative, he will get significant support from the RSC but since he has been an honest broker with the moderates, he can appeal to them without compromising on principle. Further, many members have refrained from endorsing either Roy Blunt or John Boehner waiting for a "clean break" or "fresh face" candidate. Amazingly, given the impact of the class of ’94 on the Congress, no ’94 member sits in the leadership. Shadegg might also appeal to his colleagues from ’94.
There is a significant debate within the GOP Conference on whether all eight elected leadership positions should be up or keep it limited to the Leader election. Some of the pressure is motivated by the perceived advantage that Roy Blunt has in the Leader race in that even if he loses, he remains Whip. Some that might be willing to come out publicly for Boehner or now Shadegg might be intimated by the fact that Blunt will still be in the leadership. I expect that six other elected leaders might not want to face election and could put pressure on Blunt to resign as Whip to avoid that happening
Shadegg, in a good political move, has promised to resign as Policy Chairman in seeking the Majority Leader position. It seems that there is momentum building for others to follow suit.