Former Vice President Joe Biden Joe BidenMomentum growing among Republicans for Supreme Court vote before Election Day Trump expects to nominate woman to replace Ginsburg next week Video of Lindsey Graham arguing against nominating a Supreme Court justice in an election year goes viral MORE on Saturday expressed his concern about the future of leadership in the federal government, saying the burden of leadership now lies at the state level.

"The states are going to have to step up in ways the federal government should be stepping up," Biden said at a campaign event with Virginia gubernatorial candidate Ralph Northam (D).

"The only hope for leadership we have here is at the state level," he added.

Biden's comments come after President Trump struck two major blows to former President Barack Obama Barack Hussein ObamaMomentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina Majority of voters say Trump should not nominate a Supreme Court justice: poll MORE's foreign and domestic policy legacy this week.

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Trump declared Friday that the 2015 Iran nuclear deal brokered by the Obama administration was not in the national security interests of the U.S. The president said he would not certify Tehran's compliance with the deal, though he stopped short of withdrawing from the international accord.

Trump also made his most aggressive move yet on rolling back his predecessor's signature health-care law, with the administration announcing Thursday that it would end disbursements to insurance companies offering ObamaCare plans, known as cost-sharing reduction payments.

The payments are aimed at helping low-income people afford co-pays, deductibles and other out-of-pocket costs associated with health-insurance policies.

Republicans and Democrats at the state level have come out strongly against the move.

Eighteen states and Washington, D.C., filed a lawsuit in federal court in California on Friday to stop the administration from halting the payments, while Democratic leaders called for Congress to quickly move to restore the payments, potentially through must-pass legislation later this year.