On Wednesday, the 64-year-old wore a velvet green suit as she hit the campaign trail in Georgia to support Democratic gubernatorial candidate, Stacey Abrams, who has a shot at becoming the first black female governor in the country. Big names have duly been attracted to the state: Donald Trump is due to stage a rally in Macon on Sunday, an event which prompted Kemp to withdraw from a scheduled debate.
Abrams and Kemp are both condemning an automated telephone call filled with racist and anti-Semitic statements. Civil rights groups celebrated the ruling as a major victory.
The ruling also required Kemp to direct all county election officials on how to verify proof of citizenship; to order county election boards to post a list of acceptable documentation for proving citizenship; and to update a section on his website containing information for pending voters.
"I don't want to run, OK?" Vice President Mike Pence stumped for Kemp on Thursday, and criticized the star power Abrams' campaign has attracted. President Trump will appear with Kemp on Sunday.
Numerous applications were flagged for failing to pass the state's "exact match" verification process, which requires that identification information on voter registration applications precisely match information already on file.
Winfrey did not mention Pence or the frequent GOP broadsides about "Hollywood" outsiders.
As a black woman, Ms Winfrey noted her kinship to two groups historically denied ballot access in the United States. She recalled generations of black Americans who faced "lynching. oppression. suppression", and declared that "their blood has seeped into my DNA" and forced her to the polls.
She encouraged women of all races - "sisters ... not just 'sistahs,"' she joked - to remember that they would have been "just a piece of property" with no ballot barely a century ago.
Videos uploaded to Ms Winfrey's and Ms Abrams' social media showed the television personality knocking on doors canvassing for the hopeful governor.
The pitches from Pence and Winfrey clearly fit Abrams' and Kemp's respective strategies.
"While we cannot comment on the specifics of an ongoing investigation, I can confirm that the Democratic Party of Georgia is under investigation for possible cyber crimes", Press Secretary Candice Broce says in the press release.
Among that "onslaught", Winfrey blasted Republican ads she'd seen in her hotel room casting Abrams as too radical for the state, calling it "noise...created to confound you with fear".