Brandon Shaffer (born March 22, 1971) is the former President of the Colorado State Senate. He represented Senate District 17, which encompasses the cities of Longmont, Lafeyette, Erie, and Louisville. Shaffer, a lifelong Democrat, was first elected as a State Senator in November 2004, and was reelected in 2008. Following the resignation of Senate President Peter Groff in 2009, Shaffer was elected to the post, while Senator John Morse (D-Colorado Springs) became Majority Leader.