Trump’s support for Putin is unique in American history. Previous administrations have made deals with erstwhile adversaries, as Nixon did with China, and given up on support for failing allies, as the U.S. did in Vietnam and Afghanistan. But never before have we outright switched sides, let alone supported an aggressor while vilifying that aggressor’s victim.

What makes Trump’s support for Putin even more remarkable is that Russia has, by many accounts, been actively aiding Iran against America in the war Trump started. Who says so? Well, among others, Dan Caine, chairman of the Joint Chiefs of Staff. And the aid goes beyond intelligence sharing that has helped Iran target U.S. forces. Russia has also reportedly been sending Iran explosives and weapons components.

What would Republicans be saying if a Democratic president were supporting a foreign dictator even as that dictator was helping another nation kill American troops? They would be crying “treason.” But this is all apparently “fine” with Trump.

— “The Traitor in Chief,” Paul Krugman