I know about that, but I'm not sure that they are sure they could do something like that and get away with it. Couldn't they be accused of treason or something,

I know about that, but I'm not sure that they are sure they could do something like that and get away with it. Couldn't they be accused of treason or something, and have their immunity revoked? That's why I'm saying that it should be explicitly mentioned in the law that a Senator can do this in Congress, during that Senate briefing. It shouldn't be some vague power that states Senators can do a lot of stuff without fear of repercussion.