Clark was first elected in 1980 and was re-elected every two years until retiring in 2018. She has chaired the Governmental Operations Subcommittee for Jobs Creation and Unemployment Issues, the Economic Development and Housing Subcommittee for Job Development and Training, the Economic Development Subcommittee for the Community Stabilization and Development Division, the Housing Committee, the Economic Development and International Trade Subcommittee for the Housing and Housing Finance Division, and the Finance Subcommittee for the Housing Policy and Finance and Public Health Finance Division.
Personal life
She is active in numerous South Minneapolis neighborhoods focusing on issues relating to housing, health, human-rights, labor, women's rights, peace, and affordable high-quality child care for all.
Political career
Advocacy for LGBT rights
Clark is a lesbian, and was one of three openly gay members of the Minnesota Legislature, along with Senator D. Scott Dibble and Rep. Susan Allen, both Minneapolis Democrats. After the Minnesota House voted on May 21, 2011, to place a gay marriage amendment referendum on the ballot in the 2012 general election, she and Dibble released a joint statement condemning the referendum. The referendum had voters decide whether a legal marriage was defined as between one man and one woman. Following the May 2011 House vote on the gay marriage amendment referendum, Clark stated: "It’s a sad day for the State of Minnesota. Tonight, we’ve moved one step closer to discriminating against Minnesotans simply based on who they love. This amendment won’t help a single family in Minnesota, and this vote is absolutely heartbreaking to thousands of people and families across our state. History will not look back kindly on this day or the people who voted for discrimination. The Minnesota I know is a place of inclusion, tolerance and love, and I truly believe the people of this great state will not vote to enshrine discrimination in our constitution..." In 2013, after voters voted against the amendment, Clark was the House sponsor of an effort to legalize same-sex marriage. The act passed the House 75-59, as well as the Senate, and was later signed into law by Governor Mark Dayton. It took effect on July 1, 2013. In 1993, Clark played a critical role alongside Senator Allan Spearin passing an amendment to the Minnesota Human Rights Act that banned LGBT discrimination in housing, employment, and education.
On May 25, 2017, Clark engaged in a hunger strike to show solidarity with protesters of a proposed public safety bill that would limit undocumented immigrants' ability to obtain driver's licenses.