They need a permit, so it comes down to whether the Park Service is sufficiently cowed/corrupted by the Swampy Trumpy to concoct some BS excuse (e.g. "it’s too dangerous to fly a helium balloon during the day when they’ll be setting off fireworks that night) to prevent them from hurting the Howling Yam’s delicate fee-fees.
Damn. I can’t help them with that, but I’ll wish them luck.
More of the population has living memory of Franco?
Bad press?
Before or after they were elected? and from what perspective, left or right?
Oh, if you’re asking those sort of questions, you’re already giving my post more thought than I did 
I was only intending to give a rough, thumbnail impression of the range of opinions that people in the UK have had of different US presidents.
My sole point was: “no, of course we don’t just hate them as a matter of course”.