By Susan Cornwell WASHINGTON (Reuters) – The coming second impeachment trial of former U.S. President Donald Trump on a charge of inciting the deadly storming of the Capitol has aggravated a rift among his fellow Republicans that was on full display on Sunday. At least one Republican, Senator Mitt Romney, said he believed the trial, which could lead to a vote banning Trump from future office, was a necessary response to the former president’s inflammatory call to his supporters to “fight” his election defeat before the Jan. 6 attack. Ten Republicans joined the House of Representatives in votin…