Taken overall, the CBO estimates compared for example to the similar 2015 study by the Center for Strategic and Budgetary Assessments, (CSBA) are inflated by a whopping $450 billion...
When the CSBA study came out, the same chorus of nuclear opponents complained modernization was unaffordable and unnecessary even at that price. They lost that argument, and a solid majority of Congress continued to support going forward with the strategic deterrent modernization program, which is the very bedrock for all of U.S. and allied security.