AP EXCLUSIVE: President Donald Trump's former campaign chairman secretly worked to advance the interests of Russian President Vladimir Putin a decade ago and proposed an ambitious political strategy to undermine opposition across former Soviet republics.

WASHINGTON President Donald Trump's former campaign chairman, Paul Manafort, secretly worked for a Russian billionaire to advance the interests of Russian President Vladimir Putin a decade ago and proposed an ambitious political strategy to undermine anti-Russian opposition across former Soviet republics, The Associated Press has learned.

The work appears to contradict assertions by the Trump administration and Manafort that he never worked for Russian interests.

Manafort proposed in confidential strategy plans as early as June 2005 that he would influence politics, business dealings and news coverage inside the United States, Europe and the former Soviet republics to benefit the Putin government, even as U.S.-Russia relations under Republican President George W. Bush grew worse.

Manafort pitched the plans to Russian aluminum magnate Oleg Deripaska, a close Putin ally with whom Manafort eventually signed a $10 million annual contract beginning in 2006, according to interviews with several people familiar with payments to Manafort and business records obtained by the AP.

Manafort and Deripaska maintained a business relationship until at least 2009, according to one person familiar with the work.

"We are now of the belief that this model can greatly benefit the Putin Government if employed at the correct levels with the appropriate commitment to success," Manafort wrote in the 2005 memo to Deripaska. The effort, Manafort wrote, "will be offering a great service that can re-focus, both internally and externally, the policies of the Putin government."

Manafort's plans were laid out in documents obtained by the AP that included strategy memoranda and records showing international wire transfers for millions of dollars. How much work Manafort performed under the contract was unclear.

The disclosure comes as Trump campaign advisers are the subject of an FBI investigation and two congressional inquiries. Investigators are reviewing whether the Trump campaign and its associates coordinated with Moscow to meddle in the 2016 campaign.

Manafort has dismissed the investigations as politically motivated and misguided, and said he never worked for Russian interests. The documents obtained by AP show Manafort's ties to Russia were closer than previously revealed.

In a statement to the AP, Manafort confirmed that he worked for Deripaska in various countries but said the work was being unfairly cast as "inappropriate or nefarious" as part of a "smear campaign."

"I worked with Oleg Deripaska almost a decade ago representing him on business and personal matters in countries where he had investments," Manafort said. "My work for Mr. Deripaska did not involve representing Russia's political interests."

Deripaska became one of Russia's wealthiest men under Putin, buying assets abroad in ways widely perceived to benefit the Kremlin's interests. U.S. diplomatic notes from 2006 described Deripaska as "among the 2-3 oligarchs Putin turns to on a regular basis" and "a more-or-less permanent fixture on Putin's trips abroad."

In response to questions about Manafort's consulting firm, a spokesman for Deripaska in 2008 at least three years after they began working together said Deripaska had never hired the firm. Another Deripaska spokesman in Moscow last week declined to answer AP's questions.

When asked Wednesday about Manafort's work for Deripaska, White House spokeswoman Sarah Huckabee Sanders said, "We do not feel it's appropriate to comment on someone who is not an employee at the White House."

Manafort worked as Trump's unpaid campaign chairman last year from March until August when Trump asked Manafort to resign after the AP revealed that Manafort had orchestrated a covert Washington lobbying operation until 2014 on behalf of Ukraine's ruling pro-Russian political party.

But Manafort and his associates remain in Trump's orbit.

Manafort told a colleague this year that he continues to speak with Trump by telephone. Manafort's former business partner in Eastern Europe, Rick Gates, has been seen inside the White House on a number of occasions. Gates has since helped plan Trump's inauguration and now runs a nonprofit organization, America First Policies, to back the White House agenda.

Gates, whose name does not appear in the documents, told the AP that he joined Manafort's firm in 2006 and was aware Manafort had a relationship with Deripaska, but he was not aware of the work described in the memos. Gates said he stopped working for Manafort's firm in March 2016 when he joined Trump's presidential campaign.

The newly obtained business records link Manafort more directly to Putin's interests in the region.

According to those records and people with direct knowledge of Manafort's work for Deripaska, Manafort made plans to open an office in Moscow. In strategy memos, Manafort proposed extending his existing work in Ukraine to Uzbekistan, Tajikistan and Georgia, where he pledged to bolster the legitimacy of governments friendly to Putin and undercut anti-Russian figures through political campaigns, nonprofit front groups and media operations.

One strategy memo to Deripaska bore the name of Rick Davis, who was Manafort's business partner at the time. In written responses to the AP, Davis said he did not know that his firm had proposed a plan to covertly promote the interests of the Russian government. "My name was on every piece of stationery used by the company and in every memo prior to 2006. It does not mean I had anything to do with the memo described," Davis said.