A Washington state teen who weeks ago objected to a controversial Hillary Clinton ad that used stock footage of her from when she was a child has come back with an ad of her own. And this time she's on Barack Obama's side.

Casey Knowles, who was one of the sleeping children shown in the Clinton ad that asked voters who they wanted answering the phone at 3 a.m. in a crisis, apparently is an ardent Obama backer.

Now her new YouTube ad, posted on Obama's Web site, urges voters to "reject the politics of fear that Sen. Clinton uses to drum up votes" and support the Illinois senator. Clinton's ad, which aired ahead of the Texas primary, was used to raise doubts about Obama's experience and judgment and was widely credited with boosting her performance in the contest.

In the new ad, Knowles says she was supporting Obama before Clinton's commercial aired and that she objected to the way it was produced.

Clinton "wanted to scare you into voting for her," she said -- by tinting the stock footage of her sleeping from eight years ago and adding a "scratchy voice."

At the end of the ad, she says, "I'm Casey Knowles and I approve this message, and not the other one."

Click here to see the new ad.