KIEV, Ukraine — A Ukrainian politician who communicated with Trump associates about a controversial plan to resolve Ukraine’s conflict with Kremlin-backed rebels said Monday that he has been called to testify before a grand jury connected to special counsel Robert Mueller’s investigation.

Andrii Artemenko said he could not provide details of his upcoming appearance before the grand jury, which he said is scheduled for Friday. But he said he assumed he would be asked about the peace plan, about which he communicated with Michael Cohen, President Donald Trump’s longtime personal attorney, in early 2017.

A spokesman for Mueller declined to comment.

The Artemenko case is one of the more unusual developments in the investigation into possible Russian interference in the 2016 election. The New York Times reported in February 2017 that Artemenko had contacted Felix Sater, a former business associate of Trump’s, to find out how he could make his plan for peace in Ukraine known to the Trump administration. Sater introduced Artemenko to Cohen, who left the plan in the office of then-national security adviser Michael Flynn, the Times reported. (Cohen has denied that, saying he threw the document away.)

When the news broke about the peace plan, it caused a scandal in Ukraine. Among the plan’s proposals was the idea of leasing to Russia the Crimean Peninsula — which Moscow seized from Ukraine in 2014 — for 50 years, in exchange for ending the ongoing war in Ukraine’s Donbass region. The back-channel effort also sought to have the Trump administration drop sanctions against Russia imposed by the Obama White House.

(http://www.autoadmit.com/thread.php?thread_id=3978209&forum_id=2#36061014)

That was what the "plan" was actually about

(http://www.autoadmit.com/thread.php?thread_id=3978209&forum_id=2#36061135)

https://www.vanityfair.com/news/2018/05/robert-mueller-andrii-artemenko-donald-trump-russia

(http://www.autoadmit.com/thread.php?thread_id=3978209&forum_id=2#36063263)