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. Ukraine's Leader: We Can't Be Ordered to Investigate Biden Associated Press KYIV, UKRAINE - Ukraine's president says his country can't be pressured into opening an investigation into Democratic presidential candidate Joe Biden or his son. And both Ukraine and rival Russia are pushing back at the White House for releasing a transcript of a private phone call between U.S. President Donald Trump and another world leader. President Volodymyr Zelenskiy is trying to contain damage at home and abroad after the world learned last week that Trump pushed him to "look into" Biden and his son Hunter, who served on the board of a troubled Ukrainian gas company. .