Georgia Democrat Michelle Nunn refused to say how she would have voted on ObamaCare, dodging a major issue in her Senate campaign.

"At the time the Affordable Health Care Act was passed, I was working for Points of Light. ... I wished that we had more people who had tried to architect a bipartisan legislation," she said when asked how she would have voted in an interview on MSNBC's "Morning Joe." 

After MSNBC followed up to ask if she would have voted yes or no, Nunn dodged again.

"I think it's impossible to look back retrospectively and say what would you have done if you were there," she said.

Nunn has been running to the center in conservative-leaning Georgia. She's likely to be pressed on the issue going forward. Republicans will narrow their field to two candidates following Tuesday's primary election.