Former White House adviser Fiona Hill testified Thursday that she had warned Gordon Sondland, the U.S. ambassador to the European Union, that his efforts in Ukraine on behalf of President Trump would “blow up.”

Hill, a Russia expert who reported directly to John Bolton when he was national security adviser, testified alongside David Holmes, a top staffer at the U.S. Embassy in Ukraine, before the House Intelligence Committee as part of the impeachment inquiry.

Democrats are seeking information to bolster the case that Trump sought to leverage U.S. military aid to Ukraine and a White House visit by President Volodymyr Zelensky in exchange for investigations of former vice president Joe Biden and his son Hunter Biden, among others.

●Fiona Hill testifies in impeachment inquiry about a ‘fictional narrative’ on Ukrainian interference.

●Sondland acknowledges Ukraine quid pro quo, implicates Trump, Vice President Pence, Secretary of State Mike Pompeo and others.

● Sondland’s bombshell testimony leaves Trump’s Republican allies scrambling.

●Testimony ensnares Pompeo in Ukraine scandal as he mulls political future.