Donald Trump's campaign chairman Paul Manafort resigned on Friday in the wake of campaign shake-up and revelations about his work in Ukraine.

In a statement issued as he arrived in Louisiana to tour the flood-ravaged state, Trump said Manafort offered his resignation Friday morning. The billionaire called Manafort "a true professional."

"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," Trump said.

Donald Trump’s campaign chairman Paul Manafort helped a pro-Russian political party in Ukraine secretly funnel more than $2 million to two lobbying organizations in Washington, The Associated Press reported Wednesday.

Citing unidentified sources with knowledge of the effort, the AP reported that the $2.2 million in payments was concealed in order to mask the party’s efforts to influence U.S. lawmakers.

Former Fox News CEO Roger Ailes, who resigned from the company in July after mounting allegations of sexual harassment, will advise Republican presidential nominee Donald Trump for the upcoming presidential debates, The New York Times reports.

According to the Times, Ailes is helping Trump prepare for the first presidential debate against Democratic presidential nominee Hillary Clinton, which is scheduled for Sept. 26.

For the past year, Donald Trump has been selling himself to Republican voters and party leaders as a master developer, casino mogul, airline executive and all-around brilliant businessman.

What they didn’t hear much about, though, was his single greatest talent: master self-promoter.

Now, with the general election just three months away, they are learning they may have been sold a bill of goods. That Trump was actually a so-so developer. That his casinos failed and pushed him to the edge of personal bankruptcy. That his airline was a money-losing vanity project that he eventually lost when he missed loan payments. That his business acumen, far from brilliant, is now fodder for millions of dollars’ worth of negative TV ads.

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