When I awoke early on Tuesday morning, I was stunned to learn that the Francis Scott Key Bridge in Baltimore had collapsed. We are being told that it was a tragic “accident” and that there is no evidence that any foul play was involved. Hopefully that is true. But no matter how it was caused, this tragedy is going to have an enormous impact on U.S. supply chains. And of course this comes at a really bad time, because Houthi missile strikes in the Red Sea and low water levels in the Panama Canal have been putting a tremendous amount...