Christine O’Donnell wants you, the voter, to know that she is not a witch.

“I’m not a witch” are the first words Ms. O’Donnell utters in her debut general election ad, a 30-second spot released Monday that will start airing in Delaware Tuesday.

With her hair straightened and wearing a black blazer and pearls, Ms. O’Donnell smiles directly at the camera and continues: “I’m nothing you’ve heard. I’m you.”

Since Ms. O’Donnell won the Republican party’s nomination for Delaware’s open Senate seat, she has faced a series of embarrassing videos about everything from her stance on masturbation (she’s against it) to her youthful foray into witchcraft (she dabbled) to her thoughts on evolution (she’s dubious), and she hired Fred Davis, a Republican ad wizard, to help introduce her to voters in her first general election ads.

“None of us are perfect,” Ms. O’Donnell says, “But none of us can be happy with what we see all around us: politicians who think spending, trading favors and back-room deals are the ways to stay in office. I’ll go to Washington and do what you’d do.”

The ad ends with Ms. O’Donnell repeating her message: “I’m you.”

Ms. O’Donnell, a Tea Party favorite, upset Mike Castle, a moderate Republican legislator, in her party’s primary and now faces Democrat Chris Coons in November’s election.