Former New York Congressman Anthony Weiner took a jab at Democratic presidential nominee Bernie Sanders Saturday in an op-ed for Business Insider.

Weiner, who admits that Sanders is his "kind of politician," asks Sanders just what he thinks he's doing in the 2016 race.

'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?" Weiner asks, referring to the fact that Sanders is an Independent running for the Democratic ticket.

Weiner admits that he completely understands "Bernie Mania" in Sanders' quest to unseat Democratic frontrunner Hillary Clinton for the 2016 presidential ticket, but wants to know why "[a]fter a career of steadfastly insisting that the Democratic party was not his home" does he want to "not only be a member" of the Democrat party but be its "standard bearer."

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