Vin Weber, the GOP Congressman, was a partner at Mercury Affairs,
one of the lobbying firms (along with the Podesta Group) being investigated by the Feds now.
This is from 2 years ago.
https://www.buzzfeednews.com/article/rosiegray/ukraine-lobbying-contract-linked-to-manafort-also-involved-a
Neither the firms nor Manafort filed documents with the Department of Justice under the Foreign Agents Registration Act, despite the European Centre for a Modern Ukraine's close ties to a foreign political leader and Manafort's work for Yanukovych's party. The Centre was founded by a top Party of Regions official. The AP reported that Manafort helped to steer a total of $2.2 million to the two firms in 2012.
SNIP
An email obtained by BuzzFeed News shows McSherry taking an active role in lobbying for the Centre; in the February 2013 email, he reached out to a Republican senator's office to pass on a request from Vin Weber, the former congressman who is a partner at Mercury and also lobbied for the Ukrainian group, who wanted to set up a meeting for former Polish president Aleksander Kwaśniewsk on behalf of the Centre.
Weber told Yahoo News on Wednesday that Manafort had recruited him to represent the European Centre for a Modern Ukraine, and that he had repeatedly asked Manafort who was backing the group financially, but Manafort would not say. Weber told Yahoo that he "never doubted they were tied to Yanukovych.
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A former Podesta employee told the AP that Manafort's associate Rick Gates, also now on the Trump campaign, had "described the nonprofit's role in an April 2012 meeting as supplying a source of money that could not be traced to the Ukrainian politicians who were paying him and Manafort."