Voters aren’t alone in noticing that Washington hasn’t been able to accomplish much lately. Since the burst of legislative activity in President Obama’s first two years, gridlock has ruled, and the top corporate spenders are ratcheting back their efforts to influence federal lawmaking accordingly. With Obama set to square off against strengthened congressional Republicans after the midterms, even leaner days loom on K Street. (click graph to enlarge)

This story is from the October 27, 2014 issue of Fortune.

