GOP Senator Mark Kirk Unendorses Trump

Sen. Mark Kirk on Wednesday became the first prominent Republican to effectively unendorse Donald Trump for president. “I cannot and will not support my party's nominee for president,” the Illinois-based lawmaker told the AP. Last month, when asked if he’d support Trump in the general election, Kirk said, “Certainly, if he's the nominee.” The senator also tweeted: “Given my military experience, Donald Trump does not have the temperament to command our military or our nuclear arsenal.” The GOP senator is currently in the midst of a tough re-election race, in which he trails his challenger, Democratic Rep. Tammy Duckworth.