6 Min Read WASHINGTON (Reuters) - Overwhelmed during the deadly attack on Congress by President Donald Trump’s supporters last week, U.S. security forces are mounting a national operation to thwart any violence before President-elect Joe Biden takes office. U.S. National Guard members walk near the U.S. Capitol Building on Capitol Hill in Washington, U.S., January 13, 2021. REUTERS/Jim Bourg Federal and state officials are evaluating online threats and menacing messages to members of Congress and making sure the security operation has the force to repel an attack. The incoming Biden administration has significantly ramped up security around his team ahead of the Jan. 20 inauguration.