(R-ND); Co-Chair, Sen. Jon Tester (D-MT); Sen. John Barrasso (R-WY); Sen. Steve Daines (R-MT); Sen. Mike Lee (R-UT); Sen. Mike Rounds (R-SD). Tester serves as Chair of the Senate Appropriations defense subcommittee. During a spring 2021 event hosted by the Washington, D.C.-based Advanced Nuclear Weapons Alliance, Tester said he was committed to keeping the GBSD "on track" though added there will be debate about the proposed new missiles during the 2022 defense appropriations process. According to the Arms Control Association, Caucus Senators received the following contributions from military contractors from 2012-2020: Romney ($645,000); Tester ($102,360); Barasso ($89,000); Daines ($85, 948); Enzi ($68,500); Cramer ($49,593). In total, military contractors have donated $1.2 million to the current members of the Senate ICBM Coalition and more than $15 million to the 64 members of the influential committees, the Senate and House Armed Services strategic forces subcommittees and the Senate and House Appropriations defense subcommittees, that can decide the fate of ICBM legislation. ICBM contractors are also engaged in lobbying representatives in Congress, with corporate backers of GBSD employing 380 lobbyists, according to the Arms Control Association. References External links Defense Primer: GBSD Capabilities (Congressional Research Service) GBSD Information from manufacturer Embedded systems Intercontinental ballistic missiles of the United States Nuclear weapons of the United States MIRV capable missiles