A number of US diplomats have been called to Capitol Hill for closed-door testimony this week as Democrats build their impeachment case against President Donald Trump, while the White House considers ways to slow down the process. The interviews could yield more fodder for Democrats' impeachment drive over a whistle-blower's allegations that Trump leveraged $400 million in aid to secure a promise from Ukrainian President Volodymyr Zelenskiy to investigate political rival Joe Biden, and his son Hunter, who sat on the board of a Ukrainian energy company. Trump has denied wrongdoing and assailed the probe. Those scheduled to testify: Gordon Sondland, the US ambassador to the European Union who was involved in efforts to get Ukraine to open the investigations, and Masha Yovanovitch, who was abruptly recalled from her post as US ambassador to Ukraine in May after Trump supporters questioned her loyalty to the president. The White House could formally tell House of Representatives Speaker Nancy Pelosi as early as Monday that it will ignore lawmakers' demands for documents until the Democratic-controlled House holds a vote to formally approve the impeachment inquiry. Pelosi says a vote is not needed. Democrats say she would prevail if one were held, although very few Republicans would be expected to side with the Democratic majority. Congress returns to Washington on Oct. 15 after a two-week recess. US Representative Jim Himes, a Democrat, told MSNBC on Monday that lawmakers still needed to learn more about what role the State Department and White House played in the Ukraine efforts before formal charges were raised, something likely to take "weeks, not months." The impeachment investigation could lead to the approval by the House of formal charges against Trump. A trial on whether to remove him from office would then be held in the Republican-controlled Senate, but few Republicans have broken ranks with Trump so far for asking Ukraine and China to launch investigations of Biden, a former vice president and leading contender for the Democratic nomination to face Trump in the November 2020 presidential election. On Sunday, lawyers said a second whistle-blower had come forward to substantiate an August complaint from an unnamed US government official, which touched off the investigation. A bipartisan group of about 90 former national security officials on Sunday called on federal officials and media outlets to protect the initial whistle-blower's identity, citing protections under the law, even as Trump has publicly sought for it to be revealed. Diplomatic text messages released by Democrats last week show that US officials were involved in the effort to secure a public commitment from Ukraine to look into the business dealings of Hunter Biden. Trump has alleged that Hunter Biden profited in his business dealings in both Ukraine and China from his father's position, and that Joe Biden, as vice president, pushed Ukraine to fire a prosecutor to impede a probe of a company tied to his son. There has been no evidence of wrongdoing on the part of either Biden. Those texts show Sondland seeking to downplay the concerns of another US diplomat, William Taylor, that the United States was withholding the aid to Ukraine in order to secure its cooperation. "The President has been crystal clear no quid pro quo's of any kind," Sondland wrote. "I suggest we stop the back and forths by text." Sondland is scheduled to testify on Tuesday before the three House committees leading the impeachment probe, and Yovanovitch is due to appear on Friday. State Department counselor Ulrich Brechbuhl and Deputy Secretary of State George Kent had also been called to testify this week, but dates for any appearances they might make have yet to be confirmed. — Reuters
