THE US Capitol will remain on high-alert until mid-March amid a bizarre theory that Donald Trump will become president this week.Thousands of National Guard troops will remain in Washington over fears QAnon's claim may lead to another attack on the US Capitol, after followers spoke of a "military investigation" into President Joe Biden.The request for 4,900 National Guard troops to continue their deployments in Washington until March 12 was made by US Capitol Police, Robert Salesses, a Pentagon official said."We work very closely with the FBI, Secret Service, and others and the Capitol Police to try to determine what they...