William Taylor has emerged as an unlikely central player in the events that are at the heart of the impeachment inquiry of President Donald Trump.
The retired career civil servant was tapped to run the US Embassy in Ukraine after the administration abruptly ousted the ambassador. He was then drawn into a Trump administration effort to leverage US military aid for Ukraine.
And then he apparently grew alarmed.
"I think it's crazy to withhold security assistance for help with a political campaign," he wrote at one point in excerpts of text messages released by impeachment investigators in Congress.
Now, members of Congress will hear directly from Taylor.
The former Army officer is scheduled to testify behind closed doors on Tuesday in an inquiry trying to determine if Trump committed impeachable offences by pressing the president of Ukraine into pursuing information that could help his campaign as Trump withheld military aid to the Eastern European country.
Taylor had been serving as executive vice president at the U.S. Institute of Peace, a nonpartisan think tank founded by Congress when he was appointed to run the embassy in Kyiv after Ambassador Marie Yovanovitch was removed before the end of her term following a campaign against her led by Trump's personal lawyer, Rudy Giuliani.
He was chosen for the post because he was among only a handful of former officials with experience in Ukraine who would be perceived as neutral by local officials and wouldn't raise objections at the White House, according to a colleague.
"It was a very short list, but Bill was at the top of it," said the colleague, who was not authorized to speak publicly and spoke on condition of anonymity. "We were very grateful he agreed to do it." Taylor, who had served as U.S. ambassador to Ukraine from 2006 to 2009, was welcomed back to Kyiv as a steady hand.
"He's the epitome of a seasoned statesman," said John Shmorhun, an American who heads the agricultural company AgroGeneration.
He said Taylor's experience has shown in his handling of the Trump administration's efforts to pressure Ukraine. "He seems to know the difference between right and wrong," Shmorhun said.
"We need guys like Bill Taylor working in Ukraine, helping to deal with the politics in Ukraine, having a strong arm."
Before retiring from government service, Taylor was involved in diplomatic efforts surrounding several major international conflicts. He served in Jerusalem as U.S. envoy to the Quartet of Mideast peacemakers.
He oversaw reconstruction in Iraq from 2004 to 2005, and from Kabul coordinated the US and international assistance to Afghanistan from 2002 to 2003.
He is a graduate of West Point and served as an Army infantry platoon leader and combat company commander in Vietnam and Germany.
He arrived in Kyiv a month after the sudden departure of Yovanovitch and the inauguration of Ukraine's new president, prepared to steer the embassy through the transition. He was most likely not prepared for what happened next.
In July, Trump would have his now-famous phone conversation with President Volodymyr Zelenskiy in which he pressed him to investigate unsubstantiated claims about Democratic rival Joe Biden and a debunked conspiracy theory involving a computer server at the Democratic National Committee. Trump at the time had quietly put a hold on nearly $400 million in military aid that Ukraine was counting on in its fight against Russian-backed separatists.
In the follow-up to the call, Taylor exchanged texts with two of Trump's point men on Ukraine as they were trying to get Zelenskiy to commit to the investigations before setting a date for a coveted White House visit.
In a text message to Gordon Sondland on Sept. 1, Taylor bluntly questioned Trump's motives: "Are we now saying that security assistance and WH meeting are conditioned on investigations?" Sondland, US ambassador to the European Union, told him to call him.