President Trump's personal attorney Rudy Giuliani is reacting to former national security adviser John Bolton's announcement that he's willing to testify at the Senate impeachment trial if subpoenaed.

"I don't know what he would say,” Giuliani said when asked about any concerns about Bolton testifying. 

Giuliani, who spoke to CNN at the Trump International Hotel in Washington, said everything he did was known by the State Department

On testimony that Bolton had been critical of him, Giuliani said, "He never said anything to me. Maybe he's a bit passive aggressive."

Giuliani is in town meeting with clients and does not currently have plans to meet with the President this week, he said.