Blame Trump? It's the CIA that is obstructing the release of 60 year old documents that might embarrass the Agency. The controversy about the release of the JFK assassination documents tends to expose the fact that the Warren Commission was just an exercise in government CYA. The basic question is why in the world the U.S. government would welcome a traitor (and his Russian wife who was the daughter of a KGB officer) who abandoned his post in the military and renounced his citizenship and relocated to Russia during the hottest part of the Cold War. It doesn't make sense unless you consider the big picture that JFK's quirky brother who happened to be the A.G. was consumed with plans to assassinate Castro and Oswald might have been the CIA's political tool.\before he went rogue.
The Warren Commission was mandated to find out who killed Kennedy and why it was not an exercise in CYA especially since the evidence shows Oswald acted alone.
You might read their report ( which you clearly never have ) before commenting on it otherwise you run the risk of being as embarrassed and humiliated as LARAM is every time he comments out of vast ignorance. and then gets schooled by facts.
An example is your description of Oswald and Marina Oswald. His actions may seem like a betrayal to the USA but in fact what he did was not treason under the law. You have the right to leave the USA and go elsewhere even to nations which are hostile to the USA as long as those nations welcome you. You also have the right to renounce your US citizenship which he tried to do but never completed.
Nor did he abandon his post in the military he was dishonorably discharged an later had his discharge upgraded. Being kicked out is not the same as abandoning your post.
Furthermore his wife Marina was not the daughter of a KGB officer her father was in fact a local police supervisor in Minsk.
Murder usually does not make sense except to the murderer which is why we say they had motive instead of reason. So even if does not seem to make sense to some there is no indication of a plot or conspiracy.
I will grant it is true that some of these documents may have been kept classified to avoid embarrassing the government or some of it's agencies but that can be for many reasons. For example we know J Edgar Hoover did not support the Warren Commission very well because he feared it would reflect badly on the FBI. But that was normal for Hoover nothing specific connected to one case.
It is also possible that the documents might reveal who certain agents were in the USSR or other places who were on the CIA payroll and, if so, keeping these documents secret was simply protecting their lives.
Either way many interesting things for historians and others may be revealed in them but so far nothing at all which could be considered evidence of a conspiracy to kill Kennedy