Representative Thomas Massie escalated his criticism of the Iran war on Saturday night, writing on social media that the conflict could ultimately become the Trump administration's "biggest and most costly blunder." Read More on PoliticsIn a follow-up post, Massie added that the conflict could carry steep economic and political costs. "$100+ billion in direct military costs, $100+ billion in costs to consumers, incalculable political capital burned," he wrote. While the prospect of a viable third-party movement remains uncertain, the discussions highlighted how the Iran war has become the defining issue binding together some of Trump's most prominent former allies. Growing Debate Inside MAGAThe Iran conflict has exposed one of the most consequential ideological divisions within the modern Republican coalition.