Lot's of speculation over the decades about what Gödel's Loophole was, but one wonders if it lies in this direction.
"Gödel told Morgenstern about the flaw in the constitution, which, he said, would allow the United States to legally become a fascist state." [1] Unfortunately Morgenstern never completely specified what this flaw was. As pointed out in the wikipedia article speculation is that "The loophole is that Article V's procedures can be applied to Article V itself. It can therefore be altered in a "downward" direction, making it easier to alter the article again in the future." But given how difficult it is to amend the constitution it doesn't seem like the problem lies there.
"Gödel told Morgenstern about the flaw in the constitution, which, he said, would allow the United States to legally become a fascist state." [1] Unfortunately Morgenstern never completely specified what this flaw was. As pointed out in the wikipedia article speculation is that "The loophole is that Article V's procedures can be applied to Article V itself. It can therefore be altered in a "downward" direction, making it easier to alter the article again in the future." But given how difficult it is to amend the constitution it doesn't seem like the problem lies there.
[1] https://en.wikipedia.org/wiki/G%C3%B6del%27s_Loophole