Until now. And I'm afraid that's the point the USA government wants to make with this barbaric measure. They will only leave Cuba alone if the American people demands it in exchange of enough votes or until the USA becomes a contested hegemon or until Cuba gives away everything they've fought for decades because, shit, it sure is terrible to keep holding on. To me, it doesn't matter if they can't resist anymore and give everything away, they are already a nation of giants, but I will always hope for the people of the USA to finally take over their electoral system and start taking decisions by themselves as in a true democracy.

You nailed it in the first paragraph. It’s domestic politics. Cuban immigrants have a large voting bloc in a swing state.

American national politics work off of a system designed 250 years ago to maintain a balance of power between rebelling colonies trying to form a nation-state. Any amendment to the Constitution requires the agreement of either a supermajority of Congress or a supermajority of the states themselves. Neither of which are even a slight possibility in the foreseeable future.

It’s deeply ironic that the US is such a young nation, but is crippling itself based on relatively new traditions that were always designed to be changed as needed. Changing with the times was foreseen by the Founding Fathers, who are revered as gods but whose actual views are rarely analyzed in depth.

Instead, the pull toward white Christian nationalism has destroyed all the Enlightenment ideals the country was founded upon, and the freedom for each generation to choose its own path at a fundamental level, which was explicitly the Founding Fathers’ original design, has fallen victim to partisan politics.