Lindsay Lohan wanted to stump for Barack Obama, but was turned down with a polite ''thanks, but no thanks,'' the Chicago Sun-Times reports.
The trouble-prone actress offered to host a series of events aimed at younger voters, but the Democratic presidential candidate's camp wasn't interested, the paper says.
Lohan ''is not exactly the kind of high-profile star who would be a positive for us," a top source on the Obama team told the paper.
Lohan and her all-but-confirmed girlfriend Samantha Ronson recently bashed Republican vice presidential hopeful Gov. Sarah Palin on Lohan's MySpace blog.
"I really cannot bite my tongue anymore when it comes to Sarah Palin," Lohan wrote, urging people to vote for Obama. "Is it a sin to be gay? Should it be a sin to be straight? Or to use birth control? Or to have sex before marriage? Or even to have a child out of wedlock?"
Lohan included a portion of an Associated Press story stating that Palin's Wasilla, Alaska, church was promoting a conference that promises to convert gays into heterosexuals through the power of prayer.
"Is our country so divided that the Republicans' best hope is a narrow minded, media obsessed homophobe?" Lohan asked in the blog post.
She also blasted Palin on abortion (Palin is pro-life).
"Women have come a long way in the fight to have the choice over what we do with our bodies ... and it's frightening to see that a woman in 2008 would negate all of that," she wrote.