Barr won the nomination
last week
at the party's convention in Los Angeles, along with her running mate Cindy Sheehan, the mother of a soldier killed in Iraq and anti-war activist best known for her protest outside of then-President George W. Bush's ranch in Crawford, Texas.
Barr had originally sought the Green Party presidential nomination, a bid she announced last year on "The Tonight Show with Jay Leno," but lost that contest last month to Dr. Jill Stein.
The former "Roseanne" star said Thursday she's tired of what she called the "two-headed beast," referring to the America political system's two main parties: the Republican Party and the Democratic Party.
"All they do is use 'extractionism' as their strategy, they blame each other for the fact that neither one of them has any real solutions," Barr said. "They know they don't have to because they got it all sewn up."
But the White House hopeful reserved her strongest criticism for the nation's wealthy, particularly those who work on Wall Street, and the amount of money spent on political campaigns.
"Government should not be run as a business," she said. "Government is the thing that protects people from fat cats, monopolists and crazy international bankers that write off human life."