Disgraced ex-Rep. Anthony Weiner is raising questions about presidential candidate Bernie Sanders' eligibility to participate in the Democratic primary.

Weiner, whose wife works closely with Hillary Clinton, wrote an op-ed in Business Insider Saturday asking Sanders to explain why he wants to run as a Democrat in 2016.
"I served with Bernie and he is my kind of politician — a progressive guy with some New York City attitude. It’s hard not to love Bernie Sanders. The Brooklyn accent perfected at Madison High School and Brooklyn College and the rumpled mad scientist look are perfect compliments to his colorful and unyielding presentations. Still, I have one major question for Bernie. What exactly does he think he’s doing in a Democratic presidential primary? Why is he asking for the nomination of a party he always avoided joining?"

He hammered it home, saying that while Sanders is "filling a void," the party is "not his home."
"There’s no question Bernie’s leftist agitating is filling a void in this primary process. The Democratic Party has a strong primal scream element right now. It expresses itself in frustration that the high expectations of change that came with President Obama have not been met. It howls at the failure of candidates who hew to the middle of the road and it feels the need to counter the batshit crazy it sees dominating the debate on the other side of the aisle. Our party needs a kick in the butt. Sen. Elizabeth Warren (D-Massachusetts), Paul Krugman, and Jon Stewart are currently the standard bearers for that sentiment. But Bernie Sanders? I just don’t know. After a career of steadfastly insisting that the Democratic party was not his home, now he wants to not only be a member of the party but its standard bearer? What changed? Is Bernie’s newfound party affiliation just a practical decision to run in a party that can win rather than risk being a Nader-esque spoiler on a third party line in November? That’s a fair calculation, but doesn’t it wipe away Bernie’s three decades of standing as a principled Socialist?"

Weiner's closing line was even harsher:
"In spite of all this, if Bernie wants to lead this party, he needs to explain what he's doing here in the first place."