Max Booth in the WaPost

 For the first time since the attack on Pearl Harbor, there is a substantial isolationist movement in the United States that wants to repudiate a bipartisan, stunningly successful post-World War II foreign policy based on free trade and security alliances with fellow democracies. If Donald Trump regains the White House — which, recent polls suggest, is quite possible — he would be likely to abandon both NATO and Ukraine. U.S. allies in East Asia that depend on U.S. troop deployments, notably South Korea and Japan, would also be at risk of abandonment.

The new generation of America Firsters seems hellbent on crippling the United States’ global power. They might succeed where challengers such as China, Russia, the Soviet Union, North Korea, Iran, al-Qaeda, the Islamic State, Nazi Germany, Imperial Japan and others have failed.