The thing here is that Sanders sincerely believes that the corporate media obsesses over scandal and personal foibles to distract from the issues.
He had a messy life before he got elected to anything. In 2016, when reporters dug into his 70s writing and how his son was born out of wedlock he was angry and embarrassed - and neither dented his campaign at all.
Populist Bernie-lane candidates often have been robust against scandal stories bc "the media's out to get them because they're fighting the establishment" is a powerful heuristic. On-the-ground reporters like
@aseitzwald @andrewperezdc found this after early Platner stories: His voters trusted him and saw a redemption story unfolding. Add to all this that Trump won twice - nobody knows what a killer scandal is anymore.
So you can see why Sanders defended Platner to the hilt, until this week (he has not commented yet). That's not different from what Matt is saying, I'm just noting how elemental it is to the Sanders insurgency. Digging into your personal life = you have scared The Establishment.