The presidential campaign of Rep. Jack Kemp (R-N.Y.) last week removed New Hampshire state Sen. John Chandler Jr. as an honorary county chairman in the campaign when he refused to repudiate or apologize for what he said was a joke he told about Jesse L. Jackson.

"Not only wouldn't he apologize," said Kemp press secretary John Buckley, "he then wouldn't resign."

Chandler said he still will support Kemp, but added, "I'm not going to apologize for anything I said because this is a free country . . . . I believe I have a right to express my opinion."

What Chandler said at various public events last month was that "Jesse Jackson has stopped running for president because it was found out that his grandmother had posed for the centerfold of National Geographic."

Chandler, who denies he is a racist, also has complained that "race mixing" is threatening the white race.

"We feel there's no room for that in our campaign," said Paul Young, director of Kemp's campaign in New Hampshire, although he did not disavow Chandler's support.

Young said Kemp, who earlier repudiated Chandler's remarks, demanded the apology last week after he was told Chandler had not made one.