Investigators say it’s likely the 80-year-old man fell while walking outside and became incapacitated in the cold.

President Donald Trump said Monday that he expects to put 25% tariffs on Canada and Mexico starting on Feb. 1, while declining to flesh out his plans for taxing Chinese imports.

While signing a series of executive orders on Inauguration Day, a journalist asked Trump if he’d received a letter. Trump said he didn’t know and checked the desk drawers, holding up the letter for ...