Early Service

Thissen was elected to the Minnesota House of Representatives in 2002, in his first run for public office.

During his first two terms, Thissen was a key player in passing major changes to Minnesota's eminent domain laws to protect the rights of individual property owners, the merger of the insolvent Minneapolis Teachers Retirement Fund into the statewide teacher's pension fund, a nation-leading law to curb abusive tax-preparer practices, and an overhaul of state campaign law.

In 2006, Thissen served as Finance Co-Chair of the House DFL Caucus and raised more money than the Republican opposition. In the election that November, the DFL added 19 seats to its majority. Politics in Minnesota named Thissen one of the big "winners" of the 2006 election in its November 9, 2006 edition.^{[citation needed]}

From 2007 to 2010, Thissen served as chair of the Health and Human Services Committee. Before becoming minority leader in 2011, he also served on the Health Finance Committee, the Biosciences Committee, the Telecommunications Division, the Finance Committee, the Rules Committee and the Legislative Commission on Pensions and Retirement.^[5] Thissen also served as speaker pro tempore.

Thissen was chief author of HF 1, the Children's Health Security Act. The proposal, which would provide health coverage to all children in Minnesota families who make under $60,000 per year, passed the Minnesota House in 2007.

Thissen served on the Health Care Access Commission and also served on Governor Tim Pawlenty's Health Transformation Taskforce. In 2008, he played a key role in passing health-care reform legislation that the Minneapolis Star Tribune named the prize of the 2008 session.^[6]

In the 2010 election, the DFL lost its majority in the Minnesota House. Thissen was elected by his peers to be the Minority Leader for the DFL House Caucus. He was named 2012 Legislator of the Year by Politics in Minnesota.^[7] Thissen led the Democrats back to control of the Minnesota House in the 2012 election.^[8]

Speaker of the House

After leading his caucus to victory in the 2012 election, the Minnesota House of Representatives elected Thissen Speaker for the 2013-14 legislative sessions.^[9] He became speaker on January 8, 2013.

The 2013 session was among the most productive in a generation, passing the first significant investment in early childhood education in Minnesota history; all-day, every-day kindergarten for every five-year-old in the state; a two-year tuition freeze for public college and university students; and the legalization of same-sex marriage.^[10] The legislature also passed the Minnesota Dream Act, providing in-state tuition for the children of undocumented immigrants, and expanded health coverage for hundreds of thousands of Minnesotans, creating a Minnesota-based health insurance exchange called MNSure.^[11] Minnesota's 2013 legislative session received national attention.^[12][13] The Washington Post named Thissen an "Emerging Star Outside the Beltway."^[14]

The 2014 session continued this progressive work. The legislature increased the minimum wage from among the nation's lowest to $9.50 and indexed the wage to inflation in the future.^[15] It also enacted $550 million in middle-class tax cuts, including additional significant property-tax relief, and passed limited medical marijuana legislation.^[16] And the legislature enacted the Women's Economic Security Act, a package of policy ideas Thissen had made his top priority for the session, which includes pay equity requirements for state contractors, workplace protections for caregivers and new mothers, and incentives for women entrepreneurs.^[17] Upon the session's conclusion, the Star Tribune commented, "For the most part, Minnesota is once again the state that works."^[18]

In January 2015, Thissen was elected Minority Leader by his DFL colleagues; he served in that position through the end of 2016.

Role in new Viking Stadium financing

In 2012, Thissen, then House minority leader, was instrumental in securing public financing for U.S. Bank Stadium, along with Governor Mark Dayton and then Minneapolis Mayor R.T. Rybak.^[19]

Minnesota gubernatorial campaigns

In November 2008, Thissen launched an exploratory campaign for the 2010 Minnesota gubernatorial race. On July 24, 2009, he officially announced his candidacy, noting that he would focus on the issues of health care, renewable energy and education.^[20] Thissen's campaign surprised many since he started as an unknown in a field of high-profile candidates yet built broad support across the state.^[21]

At the April 2010 DFL State Convention, Thissen won more delegates than any of his rivals in the large Congressional districts outside the Twin Cities of Minneapolis and St. Paul. He outlasted several candidates, but ultimately withdrew from the race after the fifth round of balloting, which led to a two-person race between then House Speaker Margaret Anderson Kelliher and Minneapolis Mayor R.T. Rybak.^[22]

On June 15, 2017, Thissen announced that he would run for governor again in the 2018 election.^[23] He withdrew from the race in February 2018.^[24]