"I'm always hesitant to throw around words like racist because I don't think she intended them that way," he said.
The former congresswoman ignited the flap when she told a California newspaper that "if Obama was a white man, he would not be in this position."
"And if he was a woman he would not be in this position. He happens to be very lucky to be who he is. And the country is caught up in the concept," she said.
Asked whether Ferraro's comment was racist, Eric McDaniel, a political science professor at the University of Texas at Austin, said there no way to clearly define what is racist. In this case, he said the comments were an insult.
"It's an unfortunate comment and kind of an offensive comment because what she is doing, in many ways, is framing Obama as the 'affirmative action' candidate," he said, referring to policies aimed at helping minorities.
Ferraro defended her comments on Wednesday in a round of television appearances and rejected what she called attempts by Obama's campaign to paint her remark as racist.
"For his campaign to take that and spin it and attack Hillary and me as being racist, I tell you, it is just appalling," Ferraro told CBS's "The Early Show."
On NBC Nightly News, Ferraro said she resigned because she wanted to get the dispute over her comments "off the news." She also accused the Obama campaign of putting the issue in the national spotlight.
"If anybody is going to apologize, they should apologize to me for calling me a racist," she said.
The Obama campaign, which quickly accepted the resignation of an adviser who called Clinton a "monster," had urged Clinton to break with Ferraro to send a message about the negative campaigning. Obama has run as a candidate who will change the partisan atmosphere in Washington and work to bring people together.
Ferraro, a former U.S. representative from New York, and her presidential running mate, Walter Mondale, lost in 1984 in a landslide to Republican Ronald Reagan and George H.W. Bush, the current president's father.
Obama won the Mississippi nominating contest on Tuesday, with heavy support from black voters. The two candidates are now concentrating on their campaigns in Pennsylvania, which votes on April 22.
