Biden-era assistance to Ukraine is weeks away from running out, and the expected failure of peace talks this week — and the prospect of the US walking away from the conflict — has Kyiv facing an uncertain future.

While Kyiv has been consistently open to President Trump's call for a full cease-fire, Russia has continually rejected the American peace proposals.

Now-former Pete Hegseth chief of staff Joe Kasper initiated the leak investigation that led to the firings of senior adviser Dan Caldwell, former deputy chief of staff Darin Selnick and Colin Carroll, The Post has learned.