They already have what they need to reverse the flow. Trump will quietly do so.
The Chamber of Commerce and its political allies will fight Trump every step of the way. Its a very powerful and influential lobby.
Trump needs a legislative blitz right off the bat to establish himself as a person to reckon with. He has lots of political capital and needs to use it against those sleazy denizens of Capitol Hill or they will stymie his agenda. There is not a minute to waste.