with GOP Senators who constantly strive to deny voting rights to U.S. citizens, and like many others made the mistake of using Twitter to convey his feelings (e.g. the PROLIFIC Senator Cornyn). IMO Mr. Ho regrets "Going Low" like Sen. Cornyn (and some other notable GOP luminaries), but not the underlying messages he posted...which he could not say in such a setting...somewhat like the responses we heard from Bill Barr or Brett Kavanaugh.
Sen. Kennedy's real issue here is that Mr. Ho is a fighter for voting rights...and that is a 'Show Stopper' for any card-carrying Republican leader right now.
btw, check out the attached link that lists many of Sen. Kennedy's deleted Tweets...guess he was a bit embarrassed and regretful himself more than once.
Link: https://projects.propublica.org/politwoops/user/SenJohnKennedy