With three more presidential primaries Tuesday, the Democratic candidates are getting help from family members on the campaign trail.Primaries are being held in Virginia, Maryland and Washington, D.C. Since Super Tuesday, Chelsea Clinton has been seen actively stumping for her mother.

"I don't think you should vote for my mom because of my father, I don't think you should vote against her because of my father," said the former first daughter.Former President Bill Clinton has also been on the campaign scene. He admits his role in his wife's campaign has changed since he himself became a focal point when critics claimed he injected race into the South Carolina primary.

?I think the mistake I made is to think that I was a spouse, like any other spouse, who could defend his candidate. I think I can promote Hillary, but not defend her, because I was president. I have to let her defend herself,? said the former president.

Politics is a family matter for the Obama campaign as well. Obama's groundswell of support lately has him closing in on Clinton for the Democratic Party nomination. His wife, Michelle, appeared on CNN Monday night and was asked about being the first black first lady.?I think wow, what an opportunity. What a platform, that I'll have potentially to talk about a whole range of issues that could affect the country. What a privilege,? said Michelle Obama.