Seems the radical right has gotten too much for him and instead of letting them pressure him into a govt shut down he's chosen to resign..
http://www.nytimes.com/2015/09/26/us...-congress.html
It's as if the right wing radicals didn't learn the last time they forced a govt shut down, once again they are wanting to shut the govt down to defund planned parenthood.. Guess it was all lies when they claimed that they could run the govt once they took the majority..