Johns Hopkins University (Bachelor of Arts, 1966). University of Maryland (Juris Doctor, 1972).
He served the 37th District for more than 14 years. Before entering law school, Kline worked as a merchant seaman and as a newspaper reporter. He is a veteran of the Civil Rights Movement.
He worked for SNCC in Greenwood, Mississippi, during the 1964 Freedom Summer and, after law school, returned to Greenwood in 1972 to work for North Mississippi Rural Legal Services.
In January 2010, Kline sponsored Bachelor of Science 6396 which attempted to ban assault rifles and pistols. In February 2013, Kline sponsored Bachelor of Science 5737 which would allow police to conduct warrantless searches in the homes of gun owners once per year, with a punishment of up to one year in jail for citizens who did not comply.
Kline later stated he had not closely read the bill and had made a mistake. Media reports noted the inspection provision was present in both Kline"s Bachelor of Science 6396 (2010) and earlier Bachelor of Science 5475 (2005) bills as written by the Brady Campaign and the San Francisco-based Law Center to Prevent Gun Violence.
Kline practiced law 32 years before retiring in 2004 to work for the Laborers Union.
He was a cooperating attorney with the American Civil Liberties Union and is active with National Abortion and Reproductive Rights Action League and Washington Conservation Voters.
Board directors, PAC chair National Abortion and Reproductive Rights Action League, Seattle, 1991-1997. Founding member, co-chair Washington Conservation Voters, Seattle, 1991-1997. Chair Senate Judicial committee, since 2001.
Member Washington State Trial Lawyers Association (legislation steering committee 1989-1993, chair civil rights section 1993-1995).
Married Laura Gene Middaugh, June 25, 1989. 1 child, Genevieve.