From Wiki:,_Sr.
King Sr. was a major figure in the civil rights movement in Georgia, where he rose to become the head of the NAACP in Atlanta and the Civic and Political League. He led the fight for equal teachers' salaries in Atlanta. He also played an instrumental role in ending Jim Crow laws in the state. King Sr. had refused to ride on Atlanta's bus system since the 1920s after a vicious attack on black passengers with no action against those responsible. King Sr. stressed the need for an educated, politically active black ministry.

In October 1960, when Martin Luther King, Jr. was arrested at a peaceful sit-in in Atlanta, Robert Kennedy telephoned the judge and helped secure King's release. Although King, Sr. had previously opposed Kennedy because he was a Catholic,[citation needed] he expressed his appreciation for these calls and switched his support to Kennedy. At this time, King, Sr. had been a lifelong registered Republican, and had endorsed Republican Richard Nixon.
Billboards Claim Rev. King Was RepublicanAssociated Press
Published: Saturday July 5, 2008

TALLAHASSEE - A black Republican group has put up billboards in Florida and South Carolina saying the Rev. Martin Luther King Jr. was a Republican, a claim that black leaders say is ridiculous.

The National Black Republican Association has paid for billboards showing an image of the civil rights leader and the words "Martin Luther King Jr. was REPUBLICAN." Told about the billboards, the Rev. Joseph Lowery let out a soft chuckle that grew stronger as he began to think more about the idea.

"These guys never give up, do they?" said Lowery, who co-founded the Southern Christian Leadership Conference with King. "Lord have mercy."

Seven billboards have gone up in six Florida counties, and another in Orangeburg, S.C., said Frances Rice, the Republican group's chairwoman. Part of its mission is to highlight what she said is the Democratic Party's racist past.

"I knew the King family well. We were all Republicans," said Rice, 64. "There was no way Dr. King would have wanted to be in the party of the Ku Klux Klan."

Her assertion angered state Rep. Joe Gibbons, a Democrat who chairs the Florida Legislative Black Caucus.

"Nobody knew who was leading the Ku Klux Klan, they had sheets over their heads. Was she at the cross burning meetings?" Gibbons said with a disgust that was just as strong when he talked about the billboards. "To make a statement like that is ridiculous. To make a claim without presenting proof is bogus."

The King Center in Atlanta says there is no proof that King was ever a Republican. Rice stands by her claim.

In Tampa, Clarissa Robinson sat in her car directly under the billboard on Busch Boulevard east of Interstate 275 and looked up at it.

"Why'd they put that up there?" said Robinson, 22, who is black and a Democrat. "So nobody will vote for Democrat Barack Obama. They're trying to make us vote for the other guy."

At the nearby gas station, Devoney Karvonen, 30, a white Republican, said she thought the billboard was offensive.

"I don't know the reason they would put that up," she said. "I don't think it's right. You're obviously lying about something and you shouldn't be."

Lowery, who knew King well, said there is no reason why anyone would think King was a Republican. He said King most certainly voted for President Kennedy, and the only time he openly talked about politics was when he criticized Republican Barry Goldwater during the 1964 presidential campaign.

"That was not the Martin I know and I don't think they can substantiate that by any shape, form or fashion. It's purely propaganda and poppycock," Lowery said. "Even if he was, he would have nothing to do with what the Republican Party stands for today. Do they think Martin would support George W. Bush and the war in Iraq?"
In "The Autobiography of Martin Luther King, Jr.," which was published after his death from his written material and records, King called the Republican national convention that nominated Goldwater a "frenzied wedding ... of the KKK and the radical right."

"The Republican Party geared its appeal and program to racism, reaction, and extremism," King said in the book.