100% legal. they carved out exemptions specifically for themselves, and forced a 30 day delay on normal humans from knowing what they purchase/sell. in writing.

legal corruption. the US probably has an official stamp for this shit.

Legal in that there isn’t a specific law against it. Several Reps and Senators at various times have proposed a ban on Congresspeople trading individual stocks (presumably they could still have index funds, mutual funds etc.) but shockingly enough those measures didn’t pass.