“This is fundamentally a private, commercial, corrupt use of our most sacred national monuments for private gain,” said a lawyer for the plaintiffs.

The event, coinciding with his 80th birthday, is billed as part of the celebrations for the 250th anniversary of U.S. independence

A federal lawsuit seeks to halt the upcoming UFC fight card on the White House South Lawn in a mixed martial arts show timed for President Donald Trump’s 80th birthday and part of…