When I first called for competency tests, recently fired CNN host Don Lemon said I was the one “past my prime.” Why? Because, in his mind, that describes all women over 50. He was widely and deservedly criticized for his backward views. But what’s incredible is how the Washington establishment continues to cover for those who likely lack the mental acuity to do their job.

Take Sen. Dianne Feinstein. She’s a trailblazer who’s made an indelible mark in public service. But it’s been obvious for quite some time that she’s in significant mental and physical decline. She’s missed months of votes and clearly can no longer do her job. I agree with several congressional Democrats who say Feinstein should resign immediately and let someone else who is able to do the job take over. At 89 years old, she is a prime example of why we need mental competency tests for politicians. …

The best case for such tests is in fact a man. He’s a former senator and the sitting president.

[This is one of those “It sounds good in theory” proposals. How would this work in practice? I’d suggest that it would end up politicized, and would bring us one more step closer to the Soviet era of making dissent a psychological disorder. In any event, it would take a constitutional amendment to create such a requirement for the presidency and Congress, and that’s not going to happen no matter how many times Haley brings it up. This is just performative on her part. — Ed]