Earlier quoted context omitted.
So something you might find interesting there is a website out there https://senatestockwatcher.com/ that reports on the trades made by congress people and one of the things that was discovered is that many congress people have below or only slightly above returns on stock market trading. That being said as far as I know it is only trades they make so there may be ways around it but just an interesting point of data.
Is it legal for Members of Congress to pass tips on, to friends and relatives?
So, yes.. if a Congress member passed along material information to someone that they traded on, both should get prosecuted. I'm not sure I've seen it happen to politicians in my lifetime, but totally should.