Cavs owner Dan Gilbert told CNBC Friday he received “the most vile, disgusting, racist” voicemails after LeBron James called president Donald Trump “a bum” on Twitter a week ago.

In an interview on the network’s “Squawk Box,” Gilbert described the voicemails as “some of the most disgusting things I've ever heard people say. You could hear it in their voice."

James reacted after Trump tweeted that the NBA champion Golden State Warriors weren’t welcome for a White House visit after star Stephen Curry balked at the idea during the team’s media day. At the time, Trump was also heavily criticizing NFL players and owners on Twitter for their national anthem protests.

"U bum @StephenCurry30 already said he ain't going!," James tweeted on Sept. 23. "So therefore ain't no invite. Going to White House was a great honor until you showed up!"

"It wasn't even about the issue. That's what really got me,” Gilbert told CNBC about the voicemails. “They went to who they really are, some of them. There's an element of racism in this country that I didn't realize existed."

Gilbert said he didn’t tell James about the vile reaction. Gilbert was at Cleveland Clinic Courts when the Cavs held media day Monday.

“We didn't have any specific discussions about that,” Gilbert said. “I didn't even tell LeBron this. Now he's going to know.”