The U.S. House Oversight Committee is investigating U.S. taxpayer funding for Ukraine after a watchdog report found a large percentage of the equipment has gone unaccounted for since last June. House Committee on Oversight and Accountability Chairman James Comer, R-Ky., joined by Sen. JD Vance, R-Ohio, and other Republicans on the Oversight Committee, sent a letter to Department of Defense Secretary Lloyd Austin raising concerns about the funding and asking for documentation of how it has been distributed.