In past presidencies, Jan. 19’s events might have seemed normal. President Donald Trump began his Saturday on a bitterly cold tarmac in Delaware, paying his respects to the remains of four Americans killed in Syria. He ended it staring into a teleprompter, offering to make a deal with Democrats in a broadcast announcement from the Diplomatic Reception Room on the ground floor of the White House. But Trump has met the returning dead at Dover Air Force Base only once before, and he has spent the last month ad-libbing a stubborn face-off with House Speaker Nancy Pelosi amid a record-breaking government shutdown.