[1] She is a member of the Progressive Conservative Party of Manitoba (PCs).
She held the riding for the party after incumbent MLA Bonnie Mitchelson did not stand for re-election.
On 3 May 2016, when the PC government was officially sworn in, Cox was appointed to the Executive Council of Manitoba as Minister of Sustainable Development.
[2][3] On 17 August 2017, Cox was named Minister of Sport, Culture and Heritage.
[4] She was re-elected for Kildonan-River East in the 2019 provincial election, the first after the decennial electoral redistribution that occurred the previous year.