Could Donald Trump end the Afghan war someday? I don't know if such a possibility has been on your mind, but it's certainly been on the mind of this retired U.S. Army major who fought in that land so long ago. And here's the context in which I've been thinking about that very possibility.

Back in the previous century, it used to be said that "only Nixon could go to China." In other words, only a longtime cold warrior and red-baiter like President Richard Nixon had the necessary tough-guy credentials to break with a tradition more than two decades old in February 1972. It was then that he and National Security Advisor Henry Kissinger traveled to Beijing and met with Communist leader Mao Zedong. In that way, they began a process of reestablishing relations with China (now again being impaired by Donald Trump) broken when the Communists won a civil war against the American-backed nationalists led by Chiang Kai-Shek and came to power in 1949.