For the purpose of this question, "universal healthcare" encompasses a variety of possible implementations, from a fully socialized UK-style National Health Service to a Bernie Sanders-style single payer system to a "public option" that coexists and competes with private healthcare. However, in order to count, the system must be publicly funded, free at the point of use, and available to everyone in the United States regardless of age, income, or disability (therefore existing systems such as Medicare or Medicaid do not count).