Donald Trump and Warren Buffett may not agree on much, but both believe the US trade deficit has created a problem: the farm and the factory have been sold to foreigners. The disagreement is on how to get it back.

Trump would do it with “reciprocal tariffs” and televised threats. Buffett, who has announced he is stepping away from his Berkshire Hathaway empire, at the age of 94, would take a more measured approach.