Tim Walz, Kamala Harris's running mate, visited Cherry Hill Orchards and Farm in Lancaster, Pennsylvania. He joked about JD Vance's awkward attempt to make small talk at a donut store in Valdosta, Georgia last month.

Walz asked the manager of the farm, "What am I looking at in a Whoopie Pie?" before getting in a crack at Vance. "I have no problem picking out doughnuts," the Minnesota governor joked.

Vance's own donut experience has been used by Democrats to reinforce their "weird" characterization of the senator from Ohio. "I'm JD Vance, and I'm running for vice president," the Republican candidate said to a member of staff after he walked into Holt's Sweet Shop in Valdosta. "OK," she responded uncomfortably before Vance's team was asked to stop filming.

Walz and Vance will go head to head in the vice presidential debate on October 1 on CBS. It will be moderated by CBS Evening News anchor Norah O'Donnell and chief foreign affairs correspondent Margaret Brennan.

The first debate between Kamala Harris and Donald Trump will take place on September 10 in Philadelphia. It will be hosted by ABC Network anchors, David Muir and Linsey Davis. A second debate is expected to take place in October although a date and venue has not been set.