“The most important lesson I’ve learned is that you can’t change Washington from the inside,” Barack Obama said in an interview Thursday on the Spanish-language Univision network. “You can only change it from the outside.”

A better way to put it is that Barack Obama has proved he can’t change Washington from the inside.

One case in point is the comprehensive immigration legislation Obama promised to steer to passage in his first term. The Univision interviewers, who asked tougher questions than the president has been getting from David Letterman or various rappers, zeroed in on this issue.