We were half-joking yesterday when we asked if Barack Obama slept through his Harvard Law class on the 1803 case in which the U.S. Supreme Court first asserted its power to strike down unconstitutional laws. It turns out it's no joke: The president is stunningly ignorant about constitutional law.

At an appearance this afternoon, a reporter asked Obama a question following up on yesterday's comments: "Mr. President, you said yesterday that it would be 'unprecedented' for a Supreme Court to overturn laws passed by an elected...