In 2004, Cox was first elected to the Wayne County Commission, where she served until 2014.[2] Cox chaired the Ways and Means Committee. Cox has been the 11th Congressional District chairperson, treasurer to the Wayne 11th Congressional District Republican Committee, and on the Michigan Republican State Committee as a member of the Policy Committee, Women for Bush 2008 Co-Chair, and as a delegate at-large to the 2012 Republican National Convention.
On November 4, 2014, Cox won the election and became a Republican member of the Michigan House of Representatives for District 19. Cox defeated Stacey Dogonski with 61.77% of the votes.[4] On November 8, 2016, as an incumbent, Cox won the election and continued serving District 19. Cox defeated Steve King with 61.42% of the votes.[5][2]
On November 6, 2018, Cox ran for the Michigan Senate seat for District 7 but lost the election. Cox received 47.33% of the votes and she was defeated by Dayna Polehanki with 50.56% of the votes.[6]
In 2018, Cox was endorsed for State GOP Chair by campaign manager Brad Parscale.[7] On February 23, 2019, Cox was named the chair person of Michigan Republican Party. Cox's co-chair is Terry Bowman.[3][8]
After Joe Biden won the 2020 presidential election, President Donald Trump refused to concede and made baseless claims of fraud. Cox called for delaying the certification of election results in Michigan.[9] Her complaints about the election results focused solely on Wayne County, which includes Detroit, a majority-black city.[10][11] Cox falsely claimed that Republican poll watchers were prevented from observing the ballot counting in Detroit; in fact, there were more than 134 Republican poll watchers in the TCF Center in Detroit, where ballots were counted. Politico described Cox's comments on Republican poll watchers as egregiously dishonest.[12]
Personal life
Cox is married to Mike Cox, a former Attorney General of Michigan. They have four children. Cox and her family live in Livonia, Michigan.[2][3]