Senator Ron Wyden sent a letter to the wealthy conservative donor Harlan Crow’s lawyer after records showed undisclosed flights between Hawaii and New Zealand with the Supreme Court justice in 2010.
There really doesn’t seem to be any limit to the amount of bribery going on.
https://constitution.congress.gov/resources/unconstitutional-laws/
The specifics of which laws have been overturned and when are largely immaterial to of it’s something they’re even allowed to do in the constitution.