Former President Donald Trump will make an unusual stop in the Philadelphia area this weekend: to work behind the counter at McDonald's.

Trump will visit the state for the third time this week on Sunday to “work on the fryer” to curb his Democratic opponent, Vice President Kamala Harris's campaign message about working at McDonald's while in college, according to a source familiar with the matter is familiar.

The former president will stop at a McDonald's in the Philadelphia area, the source said, but the exact location is still unclear. According to a report from CBS news station KDKA, Trump is also expected to attend the Steelers' game against the Jets in Pittsburgh on Sunday.

Trump has repeatedly claimed, without evidence, that Harris never worked at the fast food chain. Last month, he told a campaign audience in Indiana, Pennsylvania, that he wanted to work as a fry cook to “see what it's like.” CNN first reported on Tuesday that Trump would make good on that promise this weekend.

Harris, for her part, continues to use her middle-class upbringing and time at McDonald's in ads and campaign speeches as a contrast to Trump, who began his early career at his father's real estate company before growing into the billionaire he is today.

Both candidates, their colleagues and their surrogates in the election campaign will be making numerous appearances in Pennsylvania in the last three weeks leading up to Election Day. Both see the state as critical and are investing hundreds of millions of dollars to win it.

On Monday, Trump stopped in Oaks in Montgomery County for a town hall hosted by Republican South Dakota Gov. Kristi Noem, which ended in a bizarre listening-and-swaying session to his campaign playlist after two medical emergencies in the crowd . He also will return to western Pennsylvania for a campaign rally in Latrobe on Saturday, his campaign announced.

Harris will visit the Philadelphia suburbs on Wednesday after visiting Erie on Monday.