Donald Trump’s decision to make President Joe Biden’s age a centerpiece of his re-election bid has now come back to haunt him after Biden gracefully stepped aside for much younger Vice President Kamala Harris to take her spot at the top of the Democratic ticket.

According to a report from Politico’s Megan Messerly and Myah Ward, the former president went to great pains to portray Biden as a “doddering old man” and, with the 59-year-old Harris running an upbeat and energetic campaign, the former president’s latest public efforts have led to his earlier age attacks to bounce back and attach themselves on him.

As the report notes, the Harris campaign has focused on talking about the future and, combined with rally chants of “We’re not going back,” Trump increasingly looks like a relic of “a past that the country can’t afford to return to.”

“Some Democrats are relishing the fact that they can finally make an attack based on age after months of being forced to defend a historically old nominee. Democratic vice presidential nominee Tim Walz, 60, veered into overt attacks on Trump’s age at a fundraiser in Newport Beach, California, this week. He called Trump ‘low energy,’ ‘tired’ and the ‘guy that needs to get a little rest on the weekend,'” Politico is reporting.

According to one Democratic pollster, Trump’s age is the “cherry on top” for the Harris campaign.

“You already thematically want to go to the future, but now you’re able to also point to a very real thing, which is how much confidence do you have in this guy’s mental acuity, energy, overall health?” Paul Maslin suggested. “Yeah, he can still play a decent game of golf. Okay, we’ll give him that. Is that enough?”