Sen. Tim Kaine (D-VA) questioned whether Donald Trump was “mentally incapacitated” after the president unleashed a full-scale attack on Iran, the Daily Beast reports.Said Kaine: “Has President Donald Trump learned nothing from decades of U.S. meddling in Iran and forever wars in the Middle East? Is he too mentally incapacitated to realize that we had a diplomatic agreement with Iran that was keeping is nuclear program in check, until he ripped it up during his first term?”