Herein lies the rub. It’s extremely rare that a politician is tweeting about something so black-and-white that the tweet can be provably true or false. There is almost always a gray area between fact and opinion. In fact, people tend to vote for politicians because they agree with their interpretation and prioritization of a set of facts. So I think you’ll find the vast majority of political tweets reside in this gray area, because otherwise they wouldn’t be political in the first place.
And if “provably false” is the standard for editorializing, then Twitter picked a terrible example to set as the precedent. The tweet they “fact checked” was Trump making a prediction about the future. Namely, he was suggesting that mail-in ballots could lead to increased voter fraud. Not only is this an opinion, but it’s a projection about something that has not happened yet. By definition, it cannot be provably false.
I can't believe that people are criticizing an organization for exercising it's right to free speech. Like this wasn't even a case of removal of content. It was literally taking a sign and sticking another sign below it. It's something that the government would be allowed to do to a private citizen. It's that far away from censorship. And yet.
As far as changing minds goes, I think there's a swath of voters who sit in the political middle and they don't fact check. The swath is large enough that they can influence elections. It's critical to make sure they don't get influenced by politicians who make up facts on the spot.
A friend of mine and I commiserated last week about the difficulty of debating with people on political issues. We noticed that people can make up "facts" quicker than we can fact check. You would think that the onus would be on the person making an argument to provide proof. But that standard of argument is long gone. The proof seems to always be on the person who says, "No, I don't think that's right."