Valensa and ex-political prisoners wrote letter to Trump, reminding him of his obligations under Budapest Memorandum Former Polish president and Nobel Peace Prize winner Lech Walesa and several former Polish political prisoners signed a letter to US President Donald Trump expressing "horror and disgust" at his dispute with Ukrainian President Volodymyr Zelenskyy in the White House. 11 118 51 Previously in trend: Peace negotiations Trump-Zelenskyy dispute Еrump’s letter from former political prisoners