Cardin has not sponsored single payer, he opposed the iran deal, supported giving more military funding when people still don't have healthcare in this country, and he hasn't done anything to suggest to me he's interested in fighting the corrupt democratic establishment! Has he endorsed Ben Jealous? Did he endorse any justice democrat at all? Did he endorse Bernie? No! When I see someone like Chelsea who is a fighter and who is passionate about standing up to government corruption, I will support them. I can stomach Ben Cardin enough that I would endorse him in the general(especially if his opponent is Andy Harris), but I cannot support him in this primary because he's not willing to speak out against the Dem Establishment! He's too afraid.
It's easy to be a brainless fighter. It's harder to have the knowledge and skills to be a half decent senator.
"Half-decent" has gotten us nowhere, DTC. We need senators who are courageous. Single payer, free college, and a 1 % tax on wall street, are not radical ideas. Most industrialized countries already have some form of true universal healthcare, and most of them are doing just fine, so why is it so impossible to do it in this country? If your answer is "we can't afford it" well tell that to the Democratic Senators who voted for increased military spending that was higher than the level trump wanted! And the Iran deal wasn't radical either, and Ben Cardin didn't support it. This was a key part of Obama's agenda, and he couldn't bring himself to support it! Even Tulsi Gabbard the lefty trump supported it after whining about it forever! Come on!