President Trump has promised an economic boom that will last for years to come, but he’s unlikely to get one without the help of Congress to pass major new legislation, according to estimates by Trump’s own economic team. To achieve about 3% growth for the next decade, Trump would need a big infrastructure bill, more tax cuts, additional deregulation, and policies that transition more people off government aid and into full-time jobs, according to the 2019 Economic Report of the President, released Tuesday by Trump’s Council of Economic Advisers. There’s skepticism that Trump will be able to get all of...