Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. House Launches Busy Week in Trump Impeachment Probe VOA News WASHINGTON - A busy week in the public impeachment hearings into U.S. President Donald Trump begins early Tuesday with the first of three witnesses and what they know about Trump's alleged efforts to pressure Ukraine to investigate political rivals. In total, House committees will hear from nine witnesses during five separate hearings taking place on Tuesday, Wednesday and Thursday of this week. The most anticipated testimony will come from U.S. ambassador to the European Union and million-dollar Trump inaugural donor Gordon Sondland. Sondland appeared to be in the center of dealing with Ukraine over Trump's alleged demand that Ukraine investigate 2020 presidential rival and former Vice President Joe Biden for corruption. Another witness expected to draw a lot of attention is David Holmes -- a U.S. diplomat in Kyiv who apparently overheard Trump asking about the investigations during a phone call between Sondland and the president. .