PALM BEACH, Fla. – President Donald Trump’s major attack on Iran has rattled parts of the coalition that twice delivered him the White House, a fracture that could spell trouble for a divided GOP as the midterm elections approach. The strikes, which killed Iran’s supreme leader, followed a visible buildup of U.S. forces in the Middle East. But Trump’s decision to carry them out nonetheless surprised some of his supporters, who had expected the self-described anti-interventionist president to stop short of a direct attack. Nineteen-year-old Cooper Jacks said his phone lit up Saturday with messages from fellow Republicans in “disbelief” at the U.S. attack on Iran – a reaction that reflected not just surprise at Trump’s decision, but anxiety about what a new conflict could demand of younger Americans. “We often have politicians that are way past the age to be able to fight these wars being all ready to say, yeah, go fight it, and then that burden falls on my generation,” said Jacks, an officer with the Walker County Republican Party in Georgia. For some voters, Trump’s decision marked a clear break from the isolationist posture that once defined his political appeal. While the more ha
