Congress is ending the year with battles over tax reform and how to fund the government into next year. Another battle being fought is over the future of medical marijuana in America.The Justice Department is working overtime to remove a restriction in current law that prevents the federal government from prosecuting medical marijuana businesses in states where it has been made legal. The problem is that if the Department of Justice is successful, it would undermine a number of promises that President Donald J. Trump made on the campaign trail.A coalition of federalist-minded conservatives and libertarians have voiced strong support...