That is the whole point, he has not taken them on.
Most of the criticism of Trump is because he is NOT the “Man on Horseback” not because he is too much of one. Impatience with the speed of taking on the problem will not make solving it easier. Trump has taken on very powerful forces and the most difficult task he has ever undertaken.
Gingrich was not nearly as powerful as the President. I doubt that he would be able to do much more than Ryan in these circumstances. Don’t forget that Democrats even as close as 1996 are completely different than the rabid lunatics which make up today’s Democrats. Most of the party’s positions now would have been rejected then.
Schumer only has to throw wenches in the wheels to appear powerful and he has and will as long as the Senate allows filibusters.
As to returning to the Constitution, I can only hope that we can resist the soft fascism into which we are sliding. No one is held responsible for this since very few know anything about the document. Most think it means the government can do damn near anything as long as they perceive a benefit.
That is the whole point, he has not taken them on.