Riding up the escalators to the theaters, Graham took out his cellphone and showed a Washington Post reporter that indeed, the calls are still coming.
"Half of the calls are saying, 'Keep it up,'" he said.
Graham got the ball rolling Tuesday morning when he called Trump a "jackass" during an interview on "CBS This Morning." Hours later, Trump called Graham "stiff" and recounted that the senator had called him a few years ago asking that the businessman name-drop him during one of his regular appearances on Fox News Channel. Then he read out Graham's cellphone number and encouraged the crowd to call -- as his speech aired live on several cable news channels.
Graham later made light of the incident on Twitter, telling his followers that he might need to buy a new phone.
Graham said that on the ride to the theater he took a break from answering the flood of calls, handing the phone to Ayotte's young daughter and son, who would answer and ask, "Who is this?"
"The mailbox is definitely full," Ayotte's son said before they walked into the theater.