Nunn's campaign is hoping to do to Perdue what national Democrats did to Mitt Romney in 2012, painting him as a heartless corporate predator.
Perdue's campaign fired back.
"The true Michelle Nunn is starting to show. Instead of debating the issues that matter to Georgians, she is recycling old attacks against David that have already been dismissed. We expected no less from the hand-picked candidate of Barack Obama and Harry Reid," said Perdue Campaign Manager Derrick Dickey.
Polls have found a close race, though Perdue likely has an edge in the Republican-leaning state. The National Republican Senatorial Committee is set to start advertising there on Tuesday as well, their first independent expenditure ad buy of the election cycle.
This post was updated at 2:10 p.m.