You have a political movement, and you wish to have a celebrity publicly support it. Victoria Jackson would be pretty low on my list. Who would be worse?
PeeWee Herman?
Lindsay Lohan?
Jerry Sandusky?
Courtney Love
Snooki
Jenny McCarthy.
Anyone with the last name of Lohan.
Charlie Sheen.
Sarah Palin.
Michael Moore?
Ted Nugent?
MEL GIBSON!
The Situation
Donald Trump
Has it really been that long? The greatest celebrity pariah of the 20th century: O.J. Simpson.
Stephen Colbert.
Sarah Silverman
Andy Dick
As a liberal, I’m pretty embarrassed by Alec Baldwin. Dude, STFU and be funny on 30 Rock. I don’t want to know anything else about you!
Charles Manson.
Andy Dick would probably be the only one potentially more embarassing than Victoria Jackson, but he’d have a very long way to go to match her. She’s clearly insane to the point where I am embarassed for the people who hand her a platform upon which to spew Teh Crazy.
In a pre-modern world, she’d be the dirty, disheveled vagrant woman who stood in the mud in the town square screaming obscenities and denouncing the local rulers until she was walled up in the dungeon.
I’d have to go with The Donald.
You’re putting Pee-Wee Herman alongside Jerry Sandusky? Good Lord.
I mean, Lohan is bad, but she really doesn’t belong there either. Just dumb as a rock, as far as I can tell.
But Pee-Wee?!? He’s awesome.
Gary Glitter?
George W Bush.
Powerful republicans dare not even say his name, he’s in hiding effectively, and wasn’t invited to the Dem. Nat. Conv.
Does it get more, ‘persona non grata’, than that?
Well, I can understand W not being invited to the Democratic National Convention. Did you mean something else, perhaps?
I think not being invited to the Rep. Nat. Conv. would be worse for him. 
And count me as saying that Pee Wee in no way belongs on this list.
How about Orly Taitz?
Kirk Cameron.
Stephen Baldwin.
Gary Busey