instantiate a single-payer healthcare system which has been favored by a majority of the American people.

Americans are dying younger than people in all the other developed countries, despite spending half the world’s healthcare bill. A single-payer system, a system where medical providers are paid by a government identity like how Medicare works, has been dismissed by politicians and the media, but has been overwhelmingly favored by the American population. The current system values the wealth of CEOs, HMOs, and for-profit carriers over the health of the people.
47 million Americans have no health insurance.
18,000 die each year since they can't afford health care insurance.
Medical bills contribute to half of all personal bankruptcies (3/4 of those had health insurance at the time of their illness).
Americans pay nearly double what people pay for health care in single-payer countries.