A lot would depend on the severity of the “flip”. A solid ⅔ majority would be able to pass “veto-proof” legislation, or to overturn any presidential vetoes.
That being said, it seems that many of the policies the current administration are carrying out are existing laws and policies which are enforced as a type of reductio ad absurdem…extreme enforcement, and blaming past administrations and opponents for the same laws or policies.
@Dutchess_III Why is Mike Pence so scary?
Mike Pence is an ultra conservative. He doesn’t just pander to a conservative base; his conservatism is strongly rooted in his conservative religion.
According to this article in The New Yorker”, Stephen Bannon, the former White House strategist, worries that Pence would “be a President that the Kochs would own.” He’s seems already to be in the NRA’s pocket
If you want to know about the real Mike Pence, check out this report by the Human Rights Campaign.
Pay attention especially to Mike Pence’s Inner Circle on page 9, and Pence On The Issues on page 10.