Let's start with Trump.
It is very hard to predict the unpredictable however the appointment of Miller as his new chief of staff is surely an indication he will play hard ball and ignore the HUGE vote against him.I can see heaps of vetos and the DOJ amping up its 'investigations. Also remember it is the DOJ that determines who can or cannot be prosecuted on the recommendation of congress. Miller has more power so deportation aint going nowhere. A person who calls democrats a terrorist threat is mad and he is trump's main man! He is not a negotiator either.
Thus it is hard to envisage Trump changing his policies!
Also important is the fact Trump WILL determine who the next republican presidential candidate is thus they will have to embrace trumpism.
The Democrats have to look ready to 'make deals'. If the public believe them then Trump will get the blame for any vetoes and Republicans will lose the next presidential election. It will be interesting to see if they can do anything about budget repair. From where i sit they only had at worst more spending proposals at best a change in spending priorities not a reduction ( and/or a rise in taxation).
The next democrat presidential candidate will be a moderate because if he/she wins texas then it will be all over red rover and a pressive won't win texas.
The republicans are in a bind. They need to reject trumpism but cannot because MAGA cannot accept reality ( 1932 anyone). States have swung to the democrats so gerrymandering is out of the question. They probably won't get much of a swing until 2030 and those mid-terms. ( They had better hope no conservative judges die given the senate numbers.