"I just wanted to let it be known that I support Bristol and the entire Palin family," wrote Meghan McCain, whose McCainBlogette.com blog chronicles her travels on the campaign trail, ABC News reported Tuesday.

The daughter of the U.S. senator from Arizona said she has a kinship with other political children and that a question a reporter asked of her dad during the 2000 campaign about a hypothetical abortion "single-handedly changed my life." John McCain was asked what his reaction would be if Meghan, then 14, got pregnant.

Being the daughter of a president or a presidential candidate is difficult, Meghan McCain wrote.

"It's a rough go being the son or daughter of a politician," she said. "I have not known Bristol Palin very long, but there is a certain kinship I feel to her as I do other political daughters such as Chelsea Clinton, Jenna and Barbara Bush and Mary Cheney. You can't fully understand it unless you have lived it."