Newly released text messages sent by senior Trump administration officials appear to show clear instances of the White House brazenly pressuring Ukraine for political favors in exchange for cooperation from the U.S. government.

The texts were released late Thursday by the chairs of three House committees, who wrote in a letter to colleagues that they had grave concerns after speaking with State Department officials as part of the chambers unfolding impeachment inquiry into President Donald Trump s July 25 call with the leader of Ukraine. The three chairs wrote that the shocking texts were only a subset of the full body of materials that had been obtained, the entirety of which they planned to release in the coming days.

(Read the full document at the bottom of this article.)

The text message were largely sent by Gordon Sondland, the U.S. ambassador to the European Union, and Kurt Volker, who was until last month the State Departments special envoy to Ukraine, to Andriy Yermak, a top aide to Ukrainian President Volodymyr Zelensky .

In one instance that appears to be an overt quid pro quo, Volker texted Yermak just hours before the two presidents were set to speak. In the message, Volker said the White House would work to nail down the date for [a] visit to Washington but only on the assumption that President Z convinces trump he will investigate/get to the bottom of what happened in 2016.

Trumps July 25 call with Zelensky has become the flashpoint for a Democratic impeachment inquiry after a reconstruction of the call showed multiple instances of Trump pressuring his counterpart to investigate a prime political rival, former Vice President Joe Biden , and his son Hunter.