The U.S. pledged a defense aid package of weapons and equipment for Ukraine worth $300 million, U.S. National Security Advisor Jake Sullivan said at a press conference on March 12. This is the first package since last December, as U.S. funds for Kyiv have been blocked by disputes in Congress. According to Sullivan, the new package was made possible thanks to unanticipated cost savings in contracts that the Pentagon negotiated to replace equipment already sent to Ukraine through previous drawdowns. Washington can use these cost savings to provide assistance to Ukraine immediately without threat…