"You know what? They are created to confuse and confound you with fear".
Winfrey also is to appear alongside Abrams at a second town hall later on Thursday in DeKalb County.
Obama twice lost Georgia by single-digit margins, but population growth among nonwhites and some discontent with Trump in the GOP-leaning, whiter suburbs of Atlanta leave Abrams' backers cautiously optimistic she can pull an upset in a state that hasn't elevated a Democrat to the governor's office since 1998.
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Stocks climbed earlier this month after Bolsonaro led the previous round of voting, as investors preferred him to leftist parties. After Cooper Tire & Rubber reported a bigger third-quarter profit than analysts expected, its stock surged 21.4% to $30.89.
"I am here today because of the men and the women who were lynched, who were humiliated, and who were discriminated against", Winfrey said in Georgia.
Winfrey also said that she refused "to let their sacrifices be in vain".
Last week, District Judge Leigh Martin May issued a temporary restraining order blocking the state of Georgia from throwing out absentee ballots and applications in cases where a voter's signature didn't match their paperwork.
Abrams' campaign has called on him to resign, while he has said that it is a manufactured problem at a time when registration is at a record high. He told a packed crowd the race was a simple choice between economic prosperity under Republican leadership or a turn to "socialism" under Democrats.
"And I say this to Oprah, how is this living our 'best life now?' the Fox News host continued". Nobody even asked me to come here. "I think if anything if just annoys people and it turns them off". Winfrey has traveled to Georgia to campaign for Abrams, whose potential victory would make her the first African American woman to be governor in US history.