President Donald Trump is floating the possibility of keeping the UFC arena on the White House South Lawn -- built for a series of fights on his birthday and Flag Day -- permanently. In a video posted to his official TikTok account Tuesday evening, Trump sat in the Oval Office and said that the Eiffel Tower in Paris was supposed to be a temporary structure, but that France kept it up -- suggesting that the UFC arena is "quite attractive to a lot of people" so "maybe we'll never ever take it down." "People don't know that in Paris, France,...