WASHINGTON    -    U.S. diplomat Gordon Sondland has told two different stories to lawmakers leading the impeachment inquiry against President Donald Trump. On Wednesday, he is certain to face sharp questions about which one is right. The wealthy hotel entrepreneur who serves as U.S. ambassador to the European Union could be the most crucial witness yet in a week of televised hearings that have laid bare the misgivings of U.S. officials about Trump’s dealings in Ukraine. Sondland was a central player in the president’s informal campaign to get Ukraine to investigate political rival Joe Biden, a leading Democratic candidate in the 2020 presidential election. He says he did not initially realize that the former vice president was a target. Unlike some other figures close to Trump, Sondland has cooperated with the impeachment investigation. But Sondland’s story has not been consistent, and has differed in some respects from the accounts of other witnesses. Sondland told lawmakers in closed-door testimony last month that he saw no link between Trump’s investigation request and the White House’s decision to temporarily withhold $391 million in security aid to Ukraine.