Michelle Obama says she and Democrat Barack Obama probably won’t have any more children because the presidential race is enough additional responsibility.

“I think I’m done,” she told Ellen DeGeneres in an interview. “I think our third child is this campaign.”

The Obamas have two daughters _ Malia, 10, and Sasha, 7.

Michelle Obama, 44, also agreed with her husband’s response to the news that Alaska Gov. Sarah Palin’s teenage daughter was pregnant.

“This shouldn’t be an issue for political discussion,” Michelle Obama said.

Barack Obama has said people’s families and children should be off limits in the presidential campaign.

Palin, the Republican vice presidential candidate, and her husband said this week their 17-year-old unmarried daughter was five months pregnant.

“I know that they care about their kids, and we should let them deal with this issue,” Michelle Obama said.

The interview is scheduled to air Monday on “The Ellen DeGeneres Show.”