Question in the topic.
“Due to the recent events we have all seen, and to reduce the clear danger to government officials and law enforcement officers, I will take the oath of office at a location to be disclosed after the ceremony.”
Hold the ceremony on other federal land: A national park or even Camp David.
Or even at home, like Calvin Coolidge.
Of course certain people will scream and rant. “He’s hiding again.” etc. Tough!