IMO, If he was involved in something like this, you can bet he was involved in other stuff as well. They probably got more on him than something this minor. Somethng I have always suspected might be true about a substantial number of our elected officials.
You wonder why so many people in sensitive positions seem to be such sleazy types.
Could it be because they are targets of concerted efforts to compromise them? Could it be because some agents are plying them with all sorts of forbidden temptations, in order to gradually get them into a position where they are completely blackmail-able?
I know that if I ran a foreign intelligence agency, that is exactly how I would do it. Start your subject out with harmless, conventional temptations, sexual or otherwise, then gradually introduce more and more unacceptable or illegal things, until eventually the subject finds himself completely outside the law and acceptable society.
Then you own him.