The Vermont Senate’s seniority-heavy lineup is about to become a serious problem. That’s because current Senate President Pro Tem Becca Balint, seen above possibly contemplating the task of herding the caucus cats, is leaving the Senate to pursue a bid for Congress. And win or lose, she won’t be in the Senate beyond this term.

Which means the Senate will have to replace her no later than next January. And I’m here to tell you exactly how shallow the talent pool is. And that’s because so many senators have overstayed their sell-by dates.

Out of the 30 senators, a full 16 are basically too old to step into the top spot*. They’re not necessarily too old to be effective lawmakers, but they’re clearly on the downslope and I doubt that any of them would even want the job.

*For the record: Brock, Clarkson, Collamore, Cummings, Kitchel, Lyons, MacDonald, Mazza, McCormack, Nitka, Pollina, Sears, Sirotkin, Starr, White.

Before I get accused of ageism, let me expand on that cold assessment. Most of the senior senators are comfortable in their roles. They are not looking to take on a new level of responsibility. Heading the Senate caucus is a big, troublesome job. You’re always putting out fires or facing the press or twisting a fellow senator’s arm. It’s also something you tend to take on when you’re set on climbing the political ladder, not when you’re fat and happy.

Look at the last several Pro Tems. John Campbell was 47 years old when he assumed the office. Peter Shumlin and Peter Welch were in their primes, and clearly had their eyes on higher positions. There were a couple of short-time Republicans in the mid-90s; John H. Bloomer served from 1993-95; Stephen Webster succeeded him for a single term. Bloomer was 63 when he became Pro Tem; he had had a successful political career and would certainly had continued if he hadn’t been killed in a car crash in January 1995. Webster was 52 when he succeeded Bloomer; he would continue his political career well beyond his time as Pro Tem.

Before them, and four years of Peter Welch, there was Doug Racine, a relative youngster when he became Pro Tem. Tim Ashe was in his early 40s, and Balint was 53. All these folks, save Webster, were far younger than today’s cohort when they led the chamber. It’s no job for old men. It is a job for the ambitious. Of the past seven Pro Tems who survived their tenures, only two (Webster, Campbell) did not seek higher office. And Campbell got the job largely because of his lack of ambition; senior Senators had a very free hand under his, cough, “leadership.”