Sen. Bernie Sanders Bernie SandersOutrage erupts over Breonna Taylor grand jury ruling Dimon: Wealth tax 'almost impossible to do' Grand jury charges no officers in Breonna Taylor death MORE (I-Vt.) on Friday attacked Georgia Republicans, including gubernatorial candidate Secretary of State Brian Kemp (R) over reports that tens of thousands of registrations, primarily for black voters, remain on hold ahead of the midterm elections.

In a tweet, the progressive senator accused Republicans of specifically targeting African-Americans due to their tendency to vote Democratic. Kemp's opponent, former state lawmaker Stacey Abrams (D), is running to become the first black woman to serve as a U.S. governor.

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The Georgia NAACP is reportedly planning to file a lawsuit against Kemp over the voter registration forms.

"In Georgia, in order to try to win the election there, cowardly Republicans are blatantly suppressing the vote and denying many African Americans the right to participate in the election," Sanders wrote on Twitter on Friday.

In Georgia, in order to try to win the election there, cowardly Republicans are blatantly suppressing the vote and denying many African Americans the right to participate in the election. Every American must vigorously protest this outrageous action. https://t.co/UyTYfJJteR — Bernie Sanders (@BernieSanders) October 12, 2018

Abrams's campaign has called for Kemp, who is overseeing the election in his role as secretary of state, to resign from the position.

“As he has done for years, Brian Kemp is maliciously wielding the power of his office to suppress the vote for political gain and silence the voices of thousands of eligible voters — the majority of them people of color,” Abrams spokeswoman Abigail Collazo said Thursday.

A spokeswoman from Kemp's office told The Hill on Wednesday that the holds were caused by the state's "exact match" law, a policy that requires an applicant's information to match exactly what is listed by the state's Department of Driver Services or the Social Security Administration.

Kemp's campaign told CNN on Thursday that the roughly 53,000 people affected by the voter registration issue could resolve it by casting provisional ballots on Election Day.

"While outside agitators disparage this office and falsely attack us, we have kept our head down and remained focused on ensuring secure, accessible, and fair elections for all voters," a spokesperson said.