http://www.pnhp.org/facts/singlepayer_myths_singlepayer_facts.php
https://www.thenation.com/article/thanks-koch-brothers-proof-single-payer-saves-money/
https://journalofethics.ama-assn.org/article/single-payer-system-would-reduce-us-health-care-costs/2012-11
This isn't about politics except for those who can't see things any other way. It's not a democrat versus republican issue. We all need healthcare and we all pay for it. It is illogical to cling to a system that is not affordable for the majority of Americans and puts money into the pockets of third party vendors that don't really provide a service beyond paperwork.