evidence: When I came to office, I inherited a diplomatic agreement, duly negotiated between the government of the United States and the Taliban, that all U.S. forces would be out of Afghanistan by May 1, 2021, just three months after my inauguration. That’s what we inherited — that commitment. [...] Our diplomacy does not hinge on having boots in harm’s way — U.S. boots on the ground. We have to change that thinking. American troops shouldn’t be used as a bargaining chip between warring parties in other countries. You know, that’s nothing more than a recipe for keeping American troops in Afghanistan indefinitely. [...] For the past 12 years, ever since I became Vice President, I’ve carried with me a card that reminds me of the exact number of American troops killed in Iraq and Afghanistan. That exact number, not an approximation or rounded-off number — because every one of those dead are sacred human beings who left behind entire families. An exact accounting of every single solitary one needs to be had.