Paul Ryan's daughter dons Obama fan Katy Perry costume for Halloween

When it comes to Halloween garb, vice presidential candidate Paul Ryan’s daughter knows how to dress in an across-the-aisle costume.

The GOP vice presidential candidate’s 10-year-old daughter, Liza, donned a G-rated Katy Perry outfit as she trick-or-treated with her family Wednesday night.

The real Katy Perry is an outspoken supporter of President Obama. The “California Girls” singer performed at a Las Vegas fundraiser for Obama’s reelection campaign last week — her second such event in less than a month.

Ryan’s sons, Charlie, 9, and Sam, 7, dressed as “spooky goblins” as they gathered candy in their Wisconsin neighborhood, according to The Associated Press.

While Ryan’s wife, Janna, sported a witch’s hat, while the congressman kept it simple in a University of Wisconsin jacket and cap.