Honest question: Does the president really have that much more access to classified information than US senators?
I, too, would really like to have an answer to that. My assumption based on very little evidence is that the Chief Executive should have access to all classified information held by the executive branch's agencies. That seems to be logical. I seriously doubt that the President would accept an answer from one of his chiefs that "that information is classified." Now, a more nuanced and interesting answer might be found by digging into not whether the President has access to all classified information, but whether the President chooses to interrogate that classified information. There, I assume a President should, because if s/he does not, that raises serious doubts about a President making thoroughly informed decisions.
The only way forward for solving this problem is for the People to collectively say, with full knowledge of the potential consequences, that they are absolutely not willing to compromise, and want their government to trade security for inviolable protection of their freedom.
The People did so collectively say: the Bill of Rights, which this president swore to preserve, protect and defend.