I guess it should be _all_ of Congress that has clearance. My point was that the President should not be able to tell Congress he has private info they can't see, "nanny nanny booboo."
Three men can keep a secret; as long as two of them are dead.
If all 542 elected representatives (435 voting reps, 6 non-voting reps, 100 senators, and the POTUS) have clearance for all classified information, then the US effectively doesn't have any secrets at all. It is difficult (but not impossible) for foreign intelligence agencies to find out stuff that is restricted to a dozen or fewer well vetted and highly cleared individuals, plus whoever wins election as POTUS. It would be incredibly easy for almost any nation's spies to find out anything that was known to a further 441 people, whose only 'vetting' was the ability to win a seat in the house of reps.
Whether the US should or should not have secrets is a whole other debate; But assuming that we accept for the sake of argument that she should, it seems highly inadvisable to allow elected officials to have access to such information, where a simple election can act to bypass any and all vetting and security clearances that would apply to un-elected persons with a need to know.