Credit: Jon Kopaloff/FilmMagic; Steve Granitz/

Meghan McCain is slamming Bristol Palin for not voting in Tuesday's elections.

The 20-year-old daughter of former Gov. Sarah Palin, who is in L.A. competing on ABC's Dancing With the Stars, told Inside Edition she forgot to send in her "absentee ballot in Alaska. I'm going to be in trouble. Sorry, Mom!"

Appearing on the Tonight Show With Jay Leno, McCain, 26 said, "If you didn't vote in my family that was like bad news. I've been voting since I turned 18."

Ripping on Palin, she added, "I guess it's only important for Bristol Palin to vote for Dancing With the Stars. I think a lot of women worked really hard to give us the right to vote. Anyone that doesn't vote is just ridiculous."

Just because she didn't vote, Palin still has opinions on politics: She thinks her mom should run for president in 2012.

"I know that she's great and she'd be great for our country," she said.