Former Dollar General CEO David Perdue narrowly beat Rep. Jack Kingston in the Georgia GOP primary runoff tonight, and in the days leading up to election day, he made a big push to tie the U.S. Chamber of Commerce’s support for amnesty to Kingston, who had benefited from over $3 million in campaign spending from the lobby group.

“Kingston’s largest backer…is 100 percent pro-amnesty. Kingston now owes them big,” a brutal television ad from Perdue said. 

After Eric Cantor’s stunning primary loss, the Georgia race turned into a brawl over immigration, with both candidates trying to out-flank each other on their opposition to amnesty. For example, both signed a pledge from the anti-amnesty group FAIR, vowing opposition not just to providing citizenship to illegal aliens but also to increasing legal immigration.