Vice President JD Vance, during a rally in Cincinnati on Wednesday, praised Ohio Republican gubernatorial candidate Vivek Ramaswamy for having the "audacity" to cut a controversial ad featuring his Democratic opponent Amy Acton's estranged mother calling her daughter a "liar" -- a move that has sparked bipartisan backlash.

"Vivek Ramaswamy had the audacity to run a TV commercial which calls it out like it is and calls Amy Acton a liar," Vance said.

The ad, which circulated on social media late Monday, shows Acton's long-estranged mother, Donna Arthur, saying that she loves her daughter but that "Amy has a serious problem" and has lied about her past and her struggles growing up.