Immigration reform is still a 50/50; the split between House Republican is getting sharper. The House Republicans a very suspicious of the Senate and House Democrats. The Democrats want any immigration bill to pass just so it can go to conference. Once in conference, the Bill can be changed to the satisfaction of the Democrats and then brought to the House Floor (if Boehner breaks the Hastert rule). At that point, a majority of Democrats in the House and minority of Republicans in House could pass the conference comprehensive immigration bill. That is why the conservative wing of the Republican Party wants Speaker Boehner to make a promise not to bring any Bill to Conference.
The editors of the National Review, the most inflectional periodical for the Republicans wrote and article titled, “No Conference.”