AP Photo

On Labor Day afternoon in Milwaukee, President Obama finally began to vigorously push the kind of high-profile, rebuild-America infrastructure campaign that is absolutely essential if there is to be any real hope of putting Americans back to work and getting the economy back into reasonable shape over the next few years.

In a speech that was rousing, inspirational and, at times, quite funny, the president outlined a $50 billion proposal for a wide range of improvements to the nation’s transportation infrastructure. The money would be used for the construction and rehabilitation of highways, bridges, railroads, airport runways and the air traffic control system.