Mississippi voters handed Barack Obama a resounding win in Tuesday's primary.
"We have had a terrific week, we won Wyoming, and now won Mississippi," Obama said during an interview for the MSNBC show "Hardball with Chris Matthews."
Exit polls showed a stark divide by race. More than nine in ten blacks voted for Obama while seven in ten whites voted for Hillary Clinton.
Obama won on a day when remarks on race by Clinton fundraiser and political trailblazer Geraldine Ferraro caused a firestorm.
Ferraro told a California newspaper, "If Obama was a white man, he would not be in this position. And if he was a woman of any color, 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."
In response, Obama's campaign called on Clinton to cut ties with Ferraro.
"I was puzzled by her comments," said Obama. "I don't think that anybody who was planning to run for President, the place to start is to be an African-American named Barack Obama."
"I regret that it was said and I obviously reject that, I don't agree with that," Clinton commented.
Clinton also said Ferraro has no position in the campaign.
Ferraro responded that she would not have been Democrats' Vice-Presidential choice in 1984 had she been a man, and she accused critics of reverse racism in attacking her.
While Obama said Ferraro had been inspirational to him in her run, he said now she's injecting politics of the past.
The math is in Obama's favor. His Mississippi primary win helped him grow his delegate lead even further.