Speaking in South Carolina on Tuesday in front of hundreds at a rally, Donald Trump read out Sen. Lindsey Graham’s private cell number and said people could use it to reach the South Carolina Senator.

Trump and Graham have engaged in a public spat in the past few days as they battle for the Republican presidential nomination. In Trump’s speech Tuesday, he called Graham an “idiot,” after Graham called him a “jackass,” in an interview Monday with CNN’s Kate Bolduan.

Trump gave out the number and urged attendees to call it. “Give it a shot,” Trump said, urging people to call the state’s senior senator.
A call to the number went directly to voicemail and the recorded message said it was the phone number for Graham. The mailbox was full. A text message to Graham using the number was not returned.

Immediately following Trump’s rally, Graham’s campaign manager released a statement saying that the only people excited about Trump’s presidential bid are President Barack Obama and 2016 Democratic front-runner Hillary Clinton.

“Donald Trump continues to show hourly that he is ill-prepared to be‎ commander in chief,” Christian Ferry said, adding later, that “Because of Trump’s bombastic and ridiculous campaign, we aren’t talking about Obama’s horrible deal with Iran or‎ Hillary Clinton’s plans to continue Obama’s failed national security agenda.”