(CNN)Donald Trump's campaign chairman Paul Manafort has resigned from his position on the campaign, the Republican presidential nominee said in a statement Friday. "This morning Paul Manafort offered, and I accepted, his resignation from the campaign," Trump said. "I am very appreciative for his great work in helping to get us where we are today, and in particular his work guiding us through the delegate and convention process. Paul is a true professional and I wish him the greatest success." A Trump source said Manafort told Trump he was becoming a distraction and he wanted to end that. It's the second high profile departure from the top of Trump's campaign structure after campaign manager Corey Lewandowski left the operation earlier this summer. A new campaign manager and executive were named earlier this week. Trump and his running mate Mike Pence are in Baton Rouge, Louisiana, this morning, touring flood damage and meeting with residents there.