Story highlights Corey Lewandowski insisted Monday that he has "no regrets"

He downplayed reports of internal power struggles

Washington (CNN) Donald Trump's former campaign manager Corey Lewandowski said just hours after he was fired on Monday that he does not know why he was ousted, and downplayed reports that internal power struggles triggered the move.

"I don't know. I don't know the answer to that," he told CNN's Dana Bash when asked why Trump let him go.

He also heaped praise on his former boss and insisted he will do "everything" he can to make sure Trump is elected president, whether from "inside" or "outside" the campaign.

"I think Donald Trump is going to be the next president of the United States. If there's anything I can do to help make that happen ... I'll be happy to do that," Lewandowski said.

He said he told Trump on Monday "it's been an honor and a privilege" to work for him.

Read More