The term limits measure was the one element in the Contract with America that was not passed by the GOP Congress (the contract had promised to bring the issue to a vote, not pass it).
Subsequently, several states passed term limits measures. And it was these that were challenged in court and declared unconstitutional by SCOTUS.
I stand corrected! (I.S.C. as hubby says...not too often!).
I actually remember Tom Foley getting voted out on his ear after he opposed term limits, I thought that was great. Of course I also thought it kind of demonstrated why you don’t really need term limits you can just, you know, throw the bums out on a regular basis.
I do think we should have a system of no pensions or other post office benefits for any elected official, that would probably do well enough to limit terms in office.