WASHINGTON (AP) – President Donald Trump is denying he asked a U.S. ambassador about “investigations” in Ukraine a day after his call with that country’s president. The existence of the call was revealed Wednesday by William Taylor (pictured), the top U.S. diplomat in Ukraine. He testified that one of his staffers overheard Gordon Sondland, the U.S. ambassador to the European Union, speaking on the phone with Trump on July 26. Sondland used his cellphone to call Trump, and the staff member could hear Trump on the phone asking about “the investigations.” Trump is denying knowledge of the call, saying, “I know nothing about that.” He adds, “First time I’ve heard it.” An official familiar with the matter said the staffer Taylor referred to is David Holmes, the political counselor at the embassy in Kyiv. Holmes is invited to testify before Congress on Friday. (Photo: CNN)