Vance said the move will save 2.2 billion by preventing "rampant" fraud.
President Donald Trump is making it clear he's unlikely to compromise with Democrats on their health care demands as a condition of ending the government shutdown.
Republicans and Democrats remained at a stalemate on the government shutdown over the weekend as it headed into its sixth week, with millions of Americans starting to lose food aid benefits.
Millions across the country will discover just how much their plans will cost when open enrollment for Affordable Care Act insurance plans begins on Nov. 1.
As the federal government shutdown enters its tenth day, one major health care issue has continued to be a sticking point: insurance subsidies.
The Supreme Court ruled that a government task force that determines what preventive health care services insurers must cover at no cost under the ACA is constitutional.