Republicans have failed to push back..........failed!!!!!
The Republicans have stood by and done nothing.
Despite being given the majority by the people.
That is why Jebbie Bush is making guacamole at home and Trump is running away with the GOP nomination. The establishment still has parlor tricks up their sleeve to try and deny Trump (and the rank and file voters) but they seem unable to overcome the momentum that Trump has.
The first thing to understand is that most of the rules and regulations imposed by the Obama administration are perfectly legitimate under the law. They involve regulations where Congress has given a Federal agency explicit authority to make rules in one area or another.
Perfect case in point ...
The U.S. trucking industry has been fighting a battle with the Federal Motor Carrier Safety Administration (FMCSA) for years over increasingly burdensome rules that are imposed on the industry. This goes back to the early 2000s, so it's hardly a partisan issue. The FMCSA has the authority to make these rules, as directed by some statute passed by Congress years ago.
Unlike the high-profile situations you read about where various Republicans wring their fists and complain about Obama's "overreach" (that whole charade is just for theater, and is never intended to accomplish anything), the Republican Congress simply dealt with this issue quietly. The budget bill passed by Congress last December had a simple provision that stated very clearly: "Rule XYZ, adopted by the FMCSA on so-and-so date, is hereby null and void."
That was all it took, because there was no way in hell even Barack Obama was going to veto a massive budget bill over a tiny item like this.