It's unclear why Andrew Peek was forced to make a sudden departure.
Sergei Lavrov: the inscrutable face of Russian diplomacy
Parnas can be seen socializing with Pence and his wife. Pence had said recently he did not know the associate of Trump lawyer Rudy Giuliani.
The Senate voted to table a motion that would have required the upper chamber to subpoena documents for President Trump's impeachment trial.
Rules call for the case for and against impeachment to be laid out over four days with arguments in the offing as early as Wednesday.
Historic Trump impeachment trial to begin in earnest
The first CNN poll after the transmittal of the articles of impeachment to the Senate shows 51% of Americans saying they want Trump removed from office.
Ukraine presses Iran to hand over downed jet's black boxes
The brief relies on arguments that no statutory crime was committed and separation of powers keeps Congress from questioning Trump's actions.
Despite steady approval ratings, Trump is far lower than Clinton's approval during impeachment.
Canada asks Iran to send airliner's black boxes to Ukraine or France
The Senate trial will determine whether Trump will be removed from office, and could impact how Americans view the President.
Bodies of Ukrainian victims of downed plane repatriated from Iran
It was the first time the team presented its arguments, modeled on those put forward since December by Trump and his fellow Republicans.
Robert Hyde had a history of questionable and erratic behavior before news he may have kept tabs on U.S. Ambassador to Ukraine Marie Yovanovitch.
Ukraine president rejects PM's resignation over leaked recording
Pompeo plans to investigate claims that Yovanovitch was being monitored in Kiev
Trudeau urges Iran to send downed jetliner's black boxes to France
McConnell loses his top spot, slipping to second most disliked senator in the country
Celebrity lawyer Dershowitz to defend Trump
Parnas is "scared" after alleged intimidation from the White House.
Ukraine says Iran to hand over downed jet's black boxes