You are right that basically all nuke-related stuff is TS just by its very nature, and that elected critters don't get clearances. Maybe its time for a new federal law that all declared presidential and v.p. candidates must undergo background investigations. That would wipe out about 85% of all Dem contenders in the last 20-some years!
Leaky Lehey and Gary Condit come to mind.
No clearance, both on Intel Committees, both security risks.