Sociologically speaking Mormonism is very obviously a form of Christianity and that is what is relevant to this question. Let's move on.
(Also, the particulars of DeSantis's religious affiliation are apparently weirdly unclear, which I didn't realize.)
That is kind of odd. Is he like shying away from being a Catholic due to how heavily Protestant the GOP primary electorate is?... I mean, as previously stated, we literally nominated a frickin' Mormon 10+ years ago, lol ... I doubt being a Catholic is that big of a deal.
Also kind of hilarious that he got married at Disney World. I am surprised he has not had a crassly public "remarriage" to his wife somewhere else yet.
I believe the answer to your first question is yes. Biden is Catholic, and the Catholic Church may be "pro-life" but is also inconveniently anti-death penalty, relatively pro-immigration and "ethnic," and the current Pope is not exactly a right-wing capitalist.
Plus there is still residual anti-Catholicism in the South believe it or not. I've been told firsthand that the Pope is the anti-Christ by certain evangelicals... We may not be in 1928 anymore, but DeSantis being able to present himself more as an evangelical than a Catholic is probably something he's calculated as being in his favor for the primary. If he somehow won the nomination, wouldn't be surprised if he embraced his Catholicism however in an attempt to appeal to Hispanics and other ethnic minorities.
As for the Disney World thing, I didn't know that. It IS hilarious, and makes the whole feud seem oddly personal. It's funny to think of DeSantis as one of those weird Disney adults who now is like a jilted lover lol.
