President Donald Trump’s war on Iran is colliding with U.S. debt investors, who demonstrated less appetite for Treasury securities as hopes for a quick end to the conflict evaporate. This past week, auctions for two-, five- and seven-year Treasury notes all drew weak demand, forcing yields to go higher than expected. That’s a stark contrast from last month, when a Treasury offering saw the highest demand ever in the history of 30-year auctions. The short end of the yield curve is under extra pressure a ...