A key member of Elon Musk's Department of Government Efficiency has met with leadership at the Centers for Medicare & Medicaid Services, the federal agency that oversees the nation’s Medicare and Medicaid insurance programs, according to internal records reviewed by ABC News.

The final straw that reportedly flipped Senator Thom Tillis’s vote on Defense Secretary Pete Hegseth were “credible death threats” against the North Carolina lawmaker, according to sources that spoke with Vanity Fair. Tillis was the final Republican holdout on confirming the former Fox News star to lead the Pentagon.

Fourteen states led by New Mexico sued the Department of Government Efficiency, or DOGE, on Thursday challenging the alleged “unlawful delegation of executive power to Elon Musk” they say has unraveled federal agencies and “caused widespread disruption”—as criticism of Elon Musk’s increasingly powerful agency builds.

Elon Musk has been tasked by President Donald Trump with slashing federal government spending and the federal employee headcount, an effort known as DOGE.

Donald Trump said he would "love and cherish" Medicaid. He's endorsed a House GOP proposal that would likely gut the program.

Presented by American Medical Association{beacon} Health Care Health Care   The Big Story Democratic urge Musk to keep ‘hands off’ Medicare, Medicaid More than 30 Democratic

Elon Musk said his Department of Government Efficiency team is working toward cutting $1 trillion from the federal budget. PolitiFact looks at how