As they should

Nothing says political revolution like voting for a third party and letting Donald Trump win.

#Hillaryfor2016 #learnmathberniebots

Why wouldn't the green part endorse Bernie? ExpecTed

Tons and tons of Republicans despise Trump and refuse to vote for him and hate Clinton as well. When Trump gets the nomination, they'll join the thousands of Republicans and Independents who have already pledged their support to Bernie. If there were ever a time for a third party to rise, it is now.

Shouldn't the Green Party endorse their own candidate? I'm confused

No Republican is going to vote for Bernie "Socialist" Sanders, get real. They'll have to suck it up.

The U.S. population is over 320 million. The "tons" and "thousands" that you speak of are no match.

No Republican is going to vote for Sanders
Probably Hilary but not Bernie.

a vote for a third party candidate, if you're a progressive, is a vote for Trump

Depends on the state you're in.

Nah. It depends on math.

They didn't really endorse Sanders. They just said that Sanders supporters should vote Green in the general once Hillary clinches the nomination since their messages align.