In a dangerous and complex world, it’s not enough to be strong. You must also be smart. As secretary of state during the Obama administration, I argued for smar

In a dangerous and complex world, it’s not enough to be strong. You must also be smart. As secretary of state during the Obama administration, I argued for smart power, integrating the hard power of our military with the soft power of our diplomacy, development assistance, economic might and cultural influence. None of those tools can do the job alone. Together, they make America a superpower. The Trump approach is dumb power. Instead of a strong America using all our strengths to lead the world and confront our adversaries, Mr. Trump’s America will be increasingly blind and blundering, feeble and friendless.