His comments come shortly after the U.S. and Ukraine signed a minerals deal, an agreement that Vance said showed the White House is making progress.

After a failed February signing and a recent breakthrough in the Vatican, the U.S. and Ukraine have signed a historic economic partnership agreement. The agreement grants Washington unprecedented access to Ukraine's critical minerals in exchange for long-term investment and reconstruction aid.

Ukraine says Russia launched more than 100 drones into Ukraine as pressure remains for a ceasefire deal. This comes as reports emerge of an imminent mineral deal between Ukraine and the U.S. CBS News' Ramy Inocencio reports.