MoveOn Omitted Mike Gravel From Their Poll

Mike Gravel is undoubtedly the most progressive presidential candidate still running for president, why did MoveOn leave him off their poll of MoveOn members which ended up giving Barack Obama MoveOn’s endorsement with over 70% of the vote (in comparison to Hillary Clinton who finished under 30%)

One assumes they left Gravel off due to the complete lack of mainstream media attention he has received despite having never given up his campaign for president. But isn’t respecting that lack of mainstream coverage giving more power to the big media to control our democracy? If we allow big media to decide our choices for us, do we truly even have a choice?