Although Harrison was re-nominated to run again federally for the Conservatives in Desnethé—Missinippi—Churchill River, in June 2007 it was announced that he was going to be acclaimed as the
Saskatchewan Party's candidate for Meadow Lake ahead of that year's provincial election. Harrison's late acclamation came after another candidate who intended on winning the nomination dropped out. In the November
2007 provincial election, Harrison was initially declared defeated by incumbent MLA
Maynard Sonntag. However, a corrected error and absentee ballots actually gave Harrison a narrow, 37-vote lead over Sonntag, and his victory by 36 votes was confirmed by a recount. Harrison has since been re-elected four times, most recently in the
2024 general election. Following the 2007 election, Harrison was named legislative secretary to the minister of energy and resources, northern resources, and oilsands development. On May 29, 2009,
Premier Brad Wall appointed Harrison, who had quickly earned a reputation as an outspoken
backbencher, to
cabinet as Minister of Municipal Affairs. On June 29, 2010, he was moved to Minister of Enterprise and Trade in a cabinet shuffle, as well as deputy government house leader. Following the
2011 election, Harrison was promoted to Government House Leader. Harrison was dropped from cabinet in May 2012, but retained his position as House Leader. In June 2014, Harrison returned to cabinet as associate minister of economy responsible for trade, tourism, innovation, and immigration. In August 2016, Harrison succeeded
Bill Boyd as Minister of the Economy. On August 19, 2017, Harrison announced his bid for the leadership of the Saskatchewan Party, just days after Premier Wall announced that he would be retiring from politics. However, less than two weeks later, on September 1, Harrison withdrew from the race and announced that he would instead support
Scott Moe, whom Harrison said shared his values and principles. Moe went on to win the contest. After Moe's win, Harrison was named to a new cabinet position as Minister of Export and Trade Development, and also minister responsible for immigration and careers training. Harrison also dropped his advocacy for a review of the GTH scandal. On November 7, 2024, following the
2024 general election, Harrison was named Minister of
Crown Investments Corporation. == Controversies ==