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JUST IN: Amb. Bill Taylor arrives for first public impeachment inquiry testimony.
JUST IN: US State Dept. official George Kent arrives for first public impeachment inquiry testimony.
WATCH: George Conway discusses the US Constitution, President Trump and the president's actions in regard to Ukraine.
George Conway on speaking out against President Trump: "I don't frankly want to be on television. But I just don't get why people can't see this and why people are refusing to see this. It's appalling to me."
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The impeachment hearing begins with an interruption for a parliamentary inquiry.
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Live now on @MSNBC.
Live now on @MSNBC.
NEW: Chairman Schiff says that he does not know the name of the Ukraine whistleblower.
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US diplomat George Kent: It was unexpected and most unfortunate to watch some Americans launch attacks on dedicated public servants advancing US interests in Ukraine.
"In my opinion, those attacks undermined US and Ukrainian national interests."
"In my opinion, those attacks undermined US and Ukrainian national interests."
JUST IN: Read Amb. Taylor's opening statement, as prepared for delivery. nbcnews.to/2CCwMkF
BREAKING: In impeachment hearing, Amb. Taylor reveals new details of a call between Amb. Sondland and President Trump where they discussed the Biden "investigations." nbcnews.to/2XbolWM
WATCH: Amb. Taylor reveals new details of a call between Amb. Sondland and President Trump.
White House press secretary describes the ongoing impeachment hearing as a “sham hearing” that is “a colossal waste of taxpayer time and money.”
Live on @MSNBC: Republicans begin their questioning in impeachment hearing.
Chuck Rosenberg: “To the extent that this is just a president trying to get a statement from some foreign leader completely misses the point. Ukraine is under attack, their people are dying, it's a war, and this president wants something in return.” on.msnbc.com/2CCMH2p
Amb. Taylor did not identify the staffer who informed him about the incident, but a source familiar with the matter has told @NBCNews that it is David Holmes, a State Dept. official just added to the calendar to testify in a closed session. nbcnews.to/2CCP6Kq
@NBCNews WATCH: President Trump reacts to today's first public impeachment hearing. nbcnews.to/32Jty9p
@NBCNews WATCH: GOP counsel in impeachment hearing questions US diplomats Taylor and Kent about the Bidens. nbcnews.to/2KiC8Wo
WATCH: Rep. Jordan presses Amb. Taylor to reconcile details of his testimony with Amb. Sondland's testimony.
Rep. Nunes asserts his view that it is “the mothers of all conspiracies” that Pres. Trump would have the Ukrainians "start an investigation into Bidens.”
Read Pres. Trump's request to the Ukrainian president to "look into it," per White House's memo. nbcnews.com/politics/trump…
Read Pres. Trump's request to the Ukrainian president to "look into it," per White House's memo. nbcnews.com/politics/trump…
