Donald Trump’s anodyne if overexcited comment that the U.S. auto industry would face a “bloodbath” if he’s not elected and doesn’t impose 50% or 100% tariffs on cars produced predictable results. “Don’t outsmart yourself,” Sen. Brian Schatz (D-Hawaii) posted, and Joe Biden’s campaign promptly charged Trump with promising a “bloodbath” if he loses, without saying that he used a common metaphor…