Joshua Geltzer co-wrote for CNN on the maxim underlying President Trump's message to foreign countries:
If Trump succeeded in conveying any coherent message to the world amid the hand-slapping, orb-glowing and prime minister-shoving of his first overseas trip and its immediate aftermath, it was this: Do it yourself. If you're a Middle Eastern country, take care of terrorism yourself. If you're a NATO country, handle Russia yourself. If you're a low-lying country or city along the coast, deal with climate change yourself.