[1] She represents the electoral district of Riverdale South as a member of the Yukon Liberal Party.
[3] McPhee was elected as MLA for Riverdale South on November 7, 2016 as part of the Liberal majority government of Sandy Silver.
She defeated popular former city councillor and incumbent New Democrat Jan Stick by just 37 votes.
On October 27, 2021, all 11 opposition MLAs from the Yukon Party and New Democrats filed a motion calling for the resignation of McPhee as MLA over her handling of a 2019 sexual assault case at a Whitehorse elementary school when she was education minister.
[5] However, all 7 Liberal MLAs present voted against the motion and to keep McPhee as MLA, and Premier Silver expressed support for her.