From my exposure to Fox News (decontamination ongoing) a week or so back (I should call it adventures in News La-La Land), they'd lap up Hatie Katie since they like the spectacle of foamy mouthed Brits ranting on about stuff that's dear to the average US rightwingnut's heart. There's no shortage of mad Americans willing to gush their right wing effluvia, but that makes it boring.
While, as a long term former resident alien of those shores, I obviously knew Fox News wasn't exactly as fair and balanced as they might laughably have claimed, but it's utterly, utterly bonkers these days.