Could the 13 Angry Democrats be a reference to the ACA Democrats? Found several reports that Dems going to try using it in midterms.
https://talkingpointsmemo.com/news/democrats-will-hit-republicans-with-obamacare-repeal-vote
https://www.politico.com/story/2014/08/2014-elections-anti-obamacare-democrats-110237
http://acasighttps://www.wsj.com/articles/democrats-campaign-on-health-care-expansion-in-wake-of-gops-failed-aca-repeal-1526040001nups.net/18/03/22/update-house-democrats-formally-introduce-aca-20