(Corrects paragraph 15 to attribute testimony about Trump throwing a plate to Cassidy Hutchinson, not Kayleigh McEnaney; corrects name of judge in paragraph two to David Carter, not Andrew Carter) By Luc Cohen NEW YORK (Reuters) – A U.S. congressional committee probing the Jan. 6, 2021, assault on the U.S. Capitol has sought to build a case that then-President Donald Trump behaved illegally when he sought to overturn his 2020 electoral defeat, but what charges might prosecutors bring against Trump and how might he defend himself? Here are some ideas being floated now: OBSTRUCTING AN OFFICIAL P…