Is there any data to suggest this aide hadn’t received a secret clearance or otherwise? If the aide didn’t have a clearance then Feinstein would, and should, be held accountable for anything she may have said that may have been classified in his presence. To be fair, that is impossible to prove unless there was evidence he knew of or had disclosed to someone else that information.
Helps reinforce the notion that you need to be on top of everything and be diligent in protecting what you know.
Might sound a bit paranoid but I had a tourist come up to me in an airport this weekend and ask that I take a picture for them. First thing that went through my mind was “what if this is someone who is looking to get a close up picture of my face.” I won’t go into more detail but i’m 99% sure it was completely innocuous. Never know though!
Congressional aides who help prepare their congressperson for classified briefings, act as a liaison between DOD/DHS/DOJ/etc. are certainly subject to the same standards we all have been subjected to. Most of these type of staff are career staffers who get pulled from a pool to serve the various committees. Congressmen/women are not subject to the same background checks as they are granted their authority directly through the constitution.