Luke Garrett

President Trump has threatened to do just that, in an apparent response to Russia's recent testing of two nuclear-capable delivery systems that experts note did not include atomic warheads.

Meanwhile, Moscow says it's still waiting for a U.S.

response to a proposal to de facto extend the New START nuclear arms reduction treaty,

when it sunsets in February of next year.

Putin has proposed both sides continue to observe limits imposed by the treaty for an additional 12 months to give time for negotiators to hash out a new agreement.

Charles Baines, NPR News, Moscow.

Senate Majority Leader John Thune says the chamber plans to vote on a bill Sunday that could eventually reopen the government.

The legislative package includes the House passed continuing resolution, but this version would last until the end of January.

The CR would also serve as a vehicle for a partial full-year funding legislation known as a minibus.

But it remains unclear whether Democrats will sign on.

Oklahoma Senator Markway Mullen, a GOP negotiator, wasn't too hopeful.

Democrats have pushed for an extension of the Affordable Care Act subsidies before they would agree to fund the government.

Health care isn't mentioned in this latest plan.

Luke Garrett, NPR News, Washington.

Democrats and Republicans can't agree on whether or not to extend expiring health care tax credits.

This impasse has Democrats refusing to fund the government until the Republican-controlled Congress passes these health care benefit extensions.

House Minority Leader Hakeem Jeffries tells NBC he needs it in writing.

On Saturday, Senate Republicans rejected a Democrat offer to reopen the government in exchange for a one-year extension on health care subsidies.

GOP Senator James Lankford of Oklahoma tells NBC the tax credits just aren't working.

Lankford says the government will reopen by Thanksgiving, while Jeffries wasn't sure.