President Barack Obama, asked to respond at a news conference with Malaysia's prime minister during his visit to the country Sunday, called the reported remarks "incredibly offensive racist statements."
"I don't think I have to interpret those statements for you, they kind of speak for themselves," Obama said. "When ignorant folks want to advertise their ignorance, you don't really have to do anything. You just let them talk. And that's what happened here."
Obama also expressed confidence the NBA would address the situation, and said the United States still wrestles with "the legacy of race and slavery and segregation."
"Obviously, the NBA is a league that is beloved by fans all across the country," Obama said. "It's got an awful lot of African-American players. It's steeped in African-American culture. And, I suspect that the NBA is going to be deeply concerned in resolving this."
"Obviously, if the reports are true, it's unacceptable in our league," James said. "It doesn't matter, white, black or Hispanic -- all across the races it's unacceptable. As the commissioner of our league, they have to make a stand. They have to be very aggressive with it. I don't know what it will be, but we can't have that in our league."
Silver spoke Saturday night in Memphis, Tenn., before the Grizzlies' game against Oklahoma City, repeating that the league finds the audio tape "disturbing and offensive" and that Sterling agreed not to attend the Clippers' game Sunday at Golden State.
"All members of the NBA family should be afforded due process and a fair opportunity to present their side of any controversy, which is why I'm not yet prepared to discuss any potential sanctions against Donald Sterling," Silver said. "We will, however, move extraordinarily quickly in our investigation."
Silver said the NBA needs to confirm authenticity of the audio tape and interview both Sterling and the woman in the recording. The Clippers will be back in Los Angeles for Game 5 on Tuesday night.
"We do hope to have this wrapped up in the next few days," Silver said.
Clippers president Andy Roeser said in a statement that the team did not know if the tape is legitimate or has been altered. He said the woman on the tape, identified by TMZ as V. Stiviano, "is the defendant in a lawsuit brought by the Sterling family alleging that she embezzled more than $1.8 million, who told Mr. Sterling that she would 'get even."
Roeser also said the recording does not reflect Sterling's beliefs. He added that Sterling is "upset and apologizes for sentiments attributed to him" about Johnson, whom he called Sterling's friend.
The Associated Press contributed to this report.