By David Morgan and Richard Cowan WASHINGTON (Reuters) – Donald Trump’s historic second impeachment trial, on a charge of inciting last month’s deadly storming of the U.S. Capitol, opens on Tuesday with a debate over the constitutionality of the Senate trying a president after he has left office. Hundreds of Trump supporters stormed the Capitol on Jan. 6 after a fiery speech in which the then-president repeated his false claims that his Nov. 3 election defeat was the result of widespread voting fraud and told them “if you don’t fight like hell, you’re not going to have a country anymore.” The …