Five years ago, Mitt Romney was hammering Barack Obama for being soft on Russia. And Obama was ridiculing him as a Cold War fossil. The Russia exchanges may seem confusing today, but back then they were a natural outgrowth of the respective Democrat and Republican foreign policy positions.

The Dems had accused President Bush of alienating Russia with the Iraq War. The McCain-Obama debates echoed the Romney-Obama debates with McCain taking a harder line on Russia. In ’08, Vladimir Putin even suggested that relations would improve once Obama took office. By ’12, Obama was caught on a hot mic promising more flexibility for Russia after the election was over.

Until the end of the Obama era, foreign policy fell along these predictable lines. Republicans focused on the old Cold War need to maintain NATO against Russian expansionism. Democrats had their own Cold War reflex. Whenever they heard Russia, they began to talk about nuclear disarmament.

And that was exactly what Obama did.

It’s hard to overestimate how much of our foreign policy consisted of unthinking virtue signaling.

For example, no one is quite sure why Obama decided to launch his disastrous Afghanistan surge with its accompanying horrifying death toll. But a debate exchange with Mitt Romney offers one possibility.

“Governor Romney,” Obama said. “I’m glad that you recognize that Al-Qaeda is a threat, because a few months ago when you were asked what’s the biggest geopolitical threat facing America, you said Russia, not Al-Qaeda.”