Eric Trump said Friday that outgoing campaign chairman Paul Manafort was dealing with things that his father didn't want "looming over the campaign" in the final three months of the election.

"I think my father didn't want to be, you know, distracted by whatever things Paul was dealing with," Trump told Fox News' Maria Bartiromo in a preview of an interview set to air Sunday at 10 a.m. ET.

"You know, Paul was amazing. He helped us get through the primary process, he helped us after the convention, he did a great job with the delegates," Trump added.

But the candidate's newest campaign manager, veteran Republican pollster Kellyanne Conway, and CEO, Breitbart's Steve Bannon, are "the ones that are going to bring us all the way through Nov. 8 and ultimately get us the victory," Trump said.

"Again, my father just didn't want to have the distraction looming over the campaign and quite frankly looming over all the issues that Hillary's facing right now," he repeated.

Manafort resigned from the Trump campaign on Friday, less than 48 hours after Bannon and Conway ascended to their new posts.

He faced new questions earlier this week over his ties to pro-Kremlin forces after separate reports emerged about past consulting work he performed for ousted Ukrainian President Viktor Yanukovych and other officials within Ukraine's pro-Russia Party of Regions.