If you consider the current leadership of the United States to be "centrist", then you and I have irreconciably different definitions of "center".
It has has a history of veering more and more wildly to each side. The previous leader was an exciting cipher when elected -- he turned out to be centrist, but was only elected because a lot of people imagined he was more to the left than he turned out to be. And at that, he was completely stymied in his progressive platform by an extremely right-wing legislature -- which turned out to be so popular that their party repeatedly increased their power in the legislature. Before him, the country elected a clear idiot, and then re-elected him after starting a war on clearly false provocation.
People were more likely to appeal to Eisenhower's approach in the 20th century, but in the 21st, the extremes have better access to mass media, making them better able to cast the center as extremist and shifting the Overton window. I see this only increasing. It's possible that it won't succeed this November, but even if it doesn't, I don't believe that the trend will change.
America is an abomination, but itβs very far from the only country, and the vast majority of rich, free countries are run by centrists who were voted into power
I find that America tends to export its culture. Its genius is its willingness to appeal to the lowest common denominator, which others find repulsive and yet, gradually, succumb to.
Already I find hints that other English-speaking countries are studying the effectiveness of our extremist tactics (goaded, in part, by our geopolitical opponents). I think you'll see more of it elsewhere in coming decades. They'll do it because it works.
It's not a foregone conclusion, but watch out for it. I don't know how to tell you to prevent it; it works inexorably. I hope they figure something out, even if it's just having a national character that's more repulsed by it than ours turns out to be. But do not rely on that, because we're just 65 years removed from Eisenhower ourselves.
Centrists have been in unbroken power since suffrage began in most countries, so this is simply false