On Monday, US Treasury Secretary Janet Yellen drew comparisons between the financial pressure the US and its allies are putting on Russia and the efforts of a Treasury secretary in the 1940s to deny Nazi Germany financial resources. Yellen noted that in 1940, then-Treasury Secretary Henry Morgenthau persuaded then-President Franklin D. Roosevelt to sign executive orders freezing assets of Denmark and Norway despite the United States’ neutrality at the time. This made it impossible for the Nazis to loot the wealth of the countries they occupied. “We must use the tools at our disposal to fight oppression. And that lesson...