In practical terms, who do you have in mind that can defeat Obama this point? Congress is important in that the control the purse strings, and generate the laws. The president is just a suggester of laws. He can propose up the wazoo, but only Congress can do any action. As you said, they are a separate branch of government with their own duties.
Wishful thinking on your part. The President has implemented directives that have the effect of law, he has Agencies issuing directives daily to the tune of 10's of thousands of new rules, all having the effect of law.
There is not one person in this country that can not be found to have violated some law or regulation, many of which can get you arrested and held indefinitely.
Now ask yourself has John Boehner defunded any of these police state organizations? Who would believe that the IRS needs weaponized shotguns in the thousands? Who thinks it is a good idea for Cities to be using weaponized drones over our cities? Who thinks it is a good idea the president to have an internet kill switch, add to that, the house just gave him the keys to all your information? Who would have thought that the President would order the Catholic Church to provide ultimately, abortions?
We had a Coup d'état and no one noticed.