"Hey Iowa, can anyone stop Hillary?" Palin asked the crowd, before co-opting a famous Obama campaign slogan. "To borrow a phrase, 'Yes we can!' And it starts here and it starts now."
She wasn't the only Republican woman to take on Clinton Saturday. Former Hewlett Packard CEO Carly Fiorina, who has said she is considering a 2016 bid, compared her record to Clinton's.
"Like Hillary Clinton, I too have travelled thousands of miles around the globe, but unlike her, I've actually accomplished something," she said. "You see Mrs. Clinton, flying is not an accomplishment. It is an activity."