My modest proposal is an no age limit and a IQ higher than 78. Leahy would never have served in the Senate for a day let alone 48 years.
Repeal the 17th Amendment!
Some Freeper (and I wish I had saved it!) did research showing that prior to the 17th Amendment there were very few long-term Senate careers. Why? Prior to the 17th Amendment the Senators were selected by their respective state legislatures. They had to keep a close affinity with the needs of their states. Every state legislator or state grandee saw themselves in that seat so there was always competition for the job! (I still would not object to term limits!) The political action was home in the states - being governor for example! There were long term careers in the House - Henry Clay is a good example. Daniel Webster who served in both the House and the Senate was reluctant to leave the House when the Mass legislature made him a Senator. In his mind the power was in the House! (And that makes sense you’re closer to the money!) That being said term limits in the House does make sense! Pelosi, Nadler and others are good examples that have been there too long!