In their letter to DOD and DOJ, the Senators wrote: "These relationships between a well-known U.S. adversary and Mr. Musk, a beneficiary of billions of dollars in U.S. government funding, pose serious questions regarding Mr. Musk's reliability as a government contractor and a clearance holder. […] We urge an immediate review into this reporting to ascertain whether Mr. Musk's conversation and specific ties to high-level Russian officials warrant an investigation and a determination by the Department of Defense's senior debarment official whether SpaceX should exclude Mr. Musk's involvement in any and all U.S. Government contracts."