1. Democrats will be less open to deal-making.
When Trump got into office, Senate Minority Leader Chuck Schumer and other Democrats greeted him with a detailed infrastructure proposal, hoping to split Trump from Republicans and to get something passed on terms more favorable to them. Had Trump taken it up with a counterproposal and reached a compromise, he could have enjoyed praise for a bipartisan moment (one that wouldn’t have bothered his own base), played Santa Claus, and maybe even gotten a few miles of his border wall started. He likewise could have worked with both parties to fix Obamacare and called it “repeal and replace.” Republicans would have been no less eager to do tax reform later.
Now, however, Democrats will be less willing to negotiate. They see the midterm elections coming in November and anticipate winning back the House—possibly, despite long odds, even the Senate. So why not wait to cut a deal until they can get something better? To be sure, Obamacare will need help after the latest tax bill eliminated the coverage mandate, and Trump is hoping Republicans and Democrats will work together on healthcare going forward. But Democrats can still afford to wait on that.
As to be expected in an election year, a primary focus of Democrats this year will be on making Donald Trump and his allies look bad.