Well the US has no intention of giving Guantanamo back any time soon. That is like asking Putin to give Kaliningrad back or England to give up Gibraltar.There's an obvious easy solution: US gives Guantanamo back to Cuba, and then the prisoners are Cuba's problem.
Still on the table: why can't the Dems convince enough people to vote for them so they can close the gap between rich and poor?
Solving the the inequity gap in the US (or anywhere) is not a simple thing. There are at least two parts to the problem: income and assets. Income can be taxed and the tax rates can be changed (and they have been many times since the 1913 16th amendment made taxing legal. Tax bills must pass congress and be signed by the president. They are fought over rigorously. Assets are different. There is no provision in the constitution to tax assets. A new law would have to be created, and not be over turned by SCOTUS, permitting it. How to tax assets is a challenge. Some would like to just confiscate most of it. How much wealth should people be allowed to accumulate? Hard questions.
In addition, the Electoral college system allows small (in population) states to have great power in choosing the president and most of those are GOP strongholds. They would never allow any kind of asset tax to take away the wealth of their main supporters.
Since 1992 the GOP has won only one presidential election with the popular vote: Bush 2004. In all the others the Dems have won the popular vote even if they lost the electoral vote and the election. In 2020 Trump had 46.9% of the popular vote and Biden had 51.3%