Watch Major Garrett's full interview with National Security Adviser Jake Sullivan, a portion of which aired on Dec. 1, 2024 on "Face the Nation with Margaret Brennan."

President-elect Donald Trump tapped Waltz, a Florida congressman and the first Green Beret to serve in Congress, to be his national security adviser in the upcoming administration. This was Waltz’s first television appearance since being picked, though Waltz is currently the member of Congress with the most appearances on Fox News.

Outgoing National Security Adviser Jake Sullivan denied reports that the Biden administration is considering returning nuclear weapons to Ukraine, after the country relinquished its stockpile three decades ago after the fall of the Soviet Union.

Since the November 5, 2024 presidential election, the Biden administration has enormously expanded the scale of direct US military intervention into the Ukraine war.

National security adviser Jake Sullivan said Sunday that the White House is not considering returning nuclear weapons to Ukraine.

Providing Ukraine with nuclear weapons, which it willingly gave up in the early 1990s, is not considered part of the United States' military support efforts. Source: Jake Sullivan, US National Security Advisor,

The Biden administration is engaged in an 11th-hour scramble to provide Ukraine with billions of dollars in additional weaponry, a massive effort that is generating concerns internally about its potential to erode U.