Vivek Ramaswamy’s campaign for Ohio governor appears to be stumbling to the finish line after a series of setbacks — including the loss of a major endorsement and venue cancellations — amid mounting fallout from the MAGA Republican’s controversial attack ad .

The 30-second ad, released last week , features Democratic candidate Dr. Amy Acton’s mother calling her daughter a “liar” and urging Ohio residents not to vote for her.

The spot has drawn intense bipartisan backlash , with critics condemning the campaign’s use of Acton’s estranged mother, Donna Arthur. Acton has not spoken to Arthur in decades. Arthur lost custody of her children after her husband was indicted on a charge of raping Acton. He was never prosecuted on that charge before he died, after the couple fled the state.

Ramaswamy has defended the ad as “legitimate,” and President Donald Trump has rallied to his defense.…