Donald Trump’s return to the White House combined with Republican control of the Senate, and perhaps the House, will place taxes high on the policy hit parade. Trump will get much of what he promised during the campaign. But some elements of his agenda likely will be sidetracked, either because he does not seriously pursue them or because of resistance—including from Republicans—on Capitol Hill. Expiring provisions of the 2017 Tax Cuts and Jobs Act (TCJA) almost certainly will be extended, largely intact, though not without a prolonged battle over key details. Trump will enact substantial new tariffs, though at first…