Oh, yes it does. Krugman is a firm believer that the US should be responsible for feeding, clothing, and sheltering everyone in the world.
Strawman alert - no one has ever said the U.S. has to feed, clothe, and shelter 3 billion people - I believe the current debate is about 20 million max.
Just as a reminder, you said: "Krugman is a firm believer that the US should be responsible for feeding, clothing, and sheltering everyone in the world."