In a speech, he took aim at the legislation providing for the Maori electoral roll and Maori seats in Parliament.
After Dame Susan labelled his comments "grotesque and inflammatory", Dr Whyte called for her resignation because she was interfering with the election-year political process.
Last night, he also told Maori Television his party wanted to abolish the office of the Race Relations Commissioner as "we don't think there's any need for that".
In February, shortly after he took the helm at Act, Dr Whyte was left red-faced after admitting "regret" around comments that incestuous relationships between consenting adults should not be illegal.
He initially told the Herald he stood by the comments, which had been published in an article on The Ruminator website.
Less than a day later, he changed his mind.
"I regret the comments, mainly because I feel I let the party down," he told RadioLive.