Every generation of American politics has some things in common with generations that came before. But the period that comes to mind now is that which came after the Crisis of 1932, which evolved into World War II.
As was the case then, the economic crisis and previous military conflict brought with it blowback. It created enemies who threatened the very foundations of the Republic. The difference is that while FDR faced a consensus against military conflict he had to reverse, this President faces a consensus in favor of military conflict that must be reversed.
As was the case in FDR’s time, when those against his Thesis of Unity misread the past, trying to make history repeat when the opposite tack was called for, so the case against Obama’s Thesis of Consensus is based on a misreading of history.
Back then, of course, Republicans were isolationist. Many even found Mr. Hitler compelling. These people did not want America re-arming, and their control of Congress made it difficult for Roosevelt to coax the build-up of fear and passion necessary to face the challenge.