According to the Congressional Research Service, "By virtue of his constitutional role as commander-and-in-chief and head of the executive branch, the President has access to all national intelligence collected, analyzed and produced by the Intelligence Community"

Source: https://web.archive.org/web/20110113190609/http://feinstein....

I think if Congress tried to pass a law limiting the President's access to classified information, the Supreme Court would likely find it to be unconstitutional.