WASHINGTON, Sept 5 (Reuters) - A former chairman of the right-wing Proud Boys group was sentenced on Tuesday to 22 years in prison for his role in the Jan. 6, 2021, assault on the U.S. Capitol by supporters of Donald Trump trying to overturn the former president's election defeat. Enrique Tarrio was convicted of charges, including seditious conspiracy, for his role in planning the storming of the Capitol, when thousands of supporters of the Republican then-U.S. president violently tried to stop Congress from certifying the results of an election that Trump falsely claimed had widespread fraud. Federal prosecutors had asked...