You impecunious and hunchbacked Democrat teenage virgins do understand that;
1. Vermont has no party registration. Sanders could not register as a Democrat even if he wanted to.
2. Sanders would have qualified in 2016 with this statement alone he made in a Feb. 2016 town hall; "Of course I am a Democrat and running for the Democratic nomination." Which is all the proposed rule asks of a candidate.
3. It is effectively unenforceable, pointless, and only comes off as spiteful.
And I have no clue why calling oneself a "Democrat" is some kind of badge of honor to you dweebs. Donald Trump called himself a Democrat from 2001-2009. Tribalism is a bad, you see.
Anyway, register on Atlas After Dark, you losers. Free hat.
http://atlasafterdark.freeforums.net/