The changing complexity of congressional speech

Lee Drutman:

ongress now speaks at almost a full grade level lower than it did just seven years ago, with the most conservative members of Congress speaking on average at the lowest grade level, according to a new Sunlight Foundation analysis of the Congressional Record using Capitol Words.
Of course, what some might interpret as a dumbing down of Congress, others will see as more effective communications. And lawmakers of both parties still speak above the heads of the average American, who reads at between an 8th and 9th grade level.
Today’s Congress speaks at about a 10.6 grade level, down from 11.5 in 2005. By comparison, the U.S. Constitution is written at a 17.8 grade level, the Federalist Papers at a 17.1 grade level, and the Declaration of Independence at a 15.1 grade level. The Gettysburg Address comes in at an 11.2 grade level and Martin Luther King’s “I Have a Dream” speech is at a 9.4 grade level. Most major newspapers are written at between an 11th and 14th grade level. (You can find more comparisons here)