Palin rebuts rumors, says daughter pregnant

A senior McCain official said its camp had no evidence that the campaign of Democrat Barack Obama was pushing the story, but said the blog rumors circulating on websites that appeared to support Obama had the effect of being "a real anchor around the Democratic ticket."

OBAMA OFFENDED

Speaking to reporters in Monroe, Michigan, Obama said he was offended by the McCain aide's statement and that he considered people's families off-limits.

"We don't go after people's families. We don't get them involved in the politics. It's not appropriate and it's not relevant. Our people were not involved in any way in this and they will not be. And if I ever thought there was somebody in my campaign that was involved in something like that, they'd be fired," Obama said.

Obama also said: "This shouldn't be part of our politics. It has no relevance to Gov. Palin's performance as a governor or potential performance as a vice president. So I would strongly urge people to back off these kinds of stories."

The news broke as Republicans gathered in St. Paul for their convention to formally nominate McCain and Palin as the party's candidates. Palin is only the second woman picked as a U.S. vice presidential nominee.

In the short period since she was announced last Friday, Palin has helped to energize the Republican Party's conservative base, giving McCain fresh energy going into the campaign for the November 4 election against Obama and his No. 2 Sen. Joe Biden of Delaware.

(Additional reporting by Caren Bohan and Ed Stoddard)

(Editing by Howard Goller and Jackie Frank)