Paul Manafort, Donald Trump's campaign chairman, made a fortune and revived his political consultant career in Ukraine beginning with a 2005 contract with steel magnate Rinat Akhmetov, The Washington Post details, but Manafort's subsequent work for Ukraine's ruling party and since-ousted Moscow-aligned president, Viktor Yanukovych, might send him to jail, according to newly uncovered documents and emails.

The most serious legal problem for Manafort is that he and his Trump campaign deputy, Rick Gates, did not register as foreign agents for their covert work directly running a lobbying operation in Washington on behalf of Ukraine's government, The Associated Press reports, citing emails it has obtained.