John Kelly warns Senate Republicans will be tainted for not allowing witnesses: 'You open yourself up forever'
John Kelly addresses the USO of Metropolitan Washington-Baltimore's 35th Annual Awards Dinner, Arlington, Va., March 21, 2017. (U.S. Army National Guard photo by Sgt. 1st Class Jim Greenhill)

According to President Trump's former chief of staff, he thinks an impeachment trial with no witnesses should only be considered "half a trial," reports.

“In my view, they kind of leave themselves open to a lot of criticism,” John Kelly said in an interview. “It seems it was half a trial.”

Kelly says he believes new revelations from Bolton's upcoming book that Trump played a central role in a campaign to pressure Ukraine to announce an investigation into the Bidens.

“If I was advising the United States Senate, I would say, 'If you don’t respond to 75 percent of the American voters and have witnesses, it’s a job only half done,” he added. “You open yourself up forever as a Senate that shirks its responsibilities.”