President Obama’s jobs speech represented the lowest ratings he’s received for any address to a joint session of Congress of his presidency. The speech garnered 31.5 million viewers, according to the website TVbythenumbers, which was slightly lower than his Sept. 2009 health care speech to Congress, which drew 32.1 million viewers and is probably the fairest comparison. But viewed against other addresses to Congress, it looks worse, and is part of a broader downward trend. During his first speech to a joint session of Congress in February 2009, Obama drew 52.4 million viewers. His first official State of the Union...