Security enhancements are underway on the North Portico of the White House, according to a White House official.
President Donald Trump compared the UFC arena built on the White House South Lawn to the Eiffel Tower in Paris.
The White House correspondents' dinner has been rescheduled for July 24, after a shooting interrupted the annual event in April.
An overnight Department of Justice filing cast Saturday's shooting on Pennsylvania Avenue as another attempted assassination of President Donald Trump.
The suspect was identified as Nasire Best, 21, of Dundalk, Maryland.
The 54-page ruling invoked the words of George Orwell and William Shakespeare, emphasizing the importance of presidential records becoming public.