NEWYou can now listen to Fox News articles! Michigan Democratic Senate candidate Abdul El-Sayed is one of several socialist candidates making Medicare-for-all a centerpiece of their midterm campaigns, defending the policy even as El-Sayed acknowledged Sunday that it would require Americans to pay more in taxes in exchange for coverage untethered from employment.The stakes extend beyond who pays the insurance bill. A nationwide single-payer system would substantially change how healthcare is financed, what providers are paid and the role of private insurance, while potentially affecting employment and access to care under a framework radically different from the existing “Medicare” model…