So what about the 12 million “undocumented” citizens? Who is paying for them?
They pay for themselves; undocumented citizens pay taxes. In 2015 undocumented citizens paid an estimated $23.6 billion dollars in taxes[1] to the IRS.
Secondly, she wants to make the path to citizenship much more streamlined and opened, meaning they won't be undocumented... as well as abolishing ICE, which is a major player in keeping undocumented workers from reporting income or looking for more legitimate work.
Thirdly, the fact that they are undocumented does not somehow mean they deserve to have their basic quality of life needs denied to them.
But why didn’t this work for Obama?
Maybe because he never proposed a universal healthcare bill, and the bill he did eventually get through was essentially a Republican healthcare bill from several decades ago that was still "too far left" for modern day Republicans.
Socialist healthcare still needs to be payed for. And the quality of health care goes down markedly.
Yes, it does. But the numbers don't lie; socialized healthcare systems are significantly cheaper than privatized systems. We currently spend 17.4% of our total GDP on medical care, with the Dutch and Swiss being next at 11.1% of their total GDP (to compare, the UK only pays 8.5% of their total GDP in health care expenses).[2]
To put that into hard cash, that was in 2010 about $8,233 per person spent on health care. Using the 2010 graph where Norway was the second most expensive and Switzerland at third, the Norwegians paid $5.4k and Swiss $5.2k a year on health care per person (the United Kingdom paid $3.4k per person, or under half what Americans paid).[3]
I have quoted these numbers before, and perhaps it was for Gilga and not you, but I do not feel like going into them again. Essentially though, there are very, very few categories in which American healthcare is superiour to socialized countries healthcare, and when we are paying twice the amount and getting subpar results for it... I'm sorry, but you simply cannot argue that the quality of healthcare drops.[4]
Have a look at the UK NHS.
I have, and for all it's flaws (as any system is going to have) it is still incredibly more cost effective, medically effective, and protects a much larger percentage of the population than the American healthcare system. If anything, you should be asking me NOT to look at it.
[1]http://taxpayeradvocate.irs.gov/Media/Default/Documents/2015ARC/ARC15_Volume1_MSP_18_ITIN.pdf
[2]https://www.usnews.com/news/blogs/data-mine/2016/01/22/could-universal-health-care-save-us-taxpayers-money
[3]https://www.pbs.org/newshour/health/health-costs-how-the-us-compares-with-other-countries
[4]https://www.healthsystemtracker.org/chart-collection/quality-u-s-healthcare-system-compare-countries/#item-u-s-highest-rate-deaths-amenable-health-care-among-comparable-oecd-countries