By Patricia Zengerle WASHINGTON (Reuters) -The U.S. Congressional Progressive Caucus withdrew a letter to the White House urging a negotiated settlement to the war in Ukraine, the group’s chairperson, Democratic Representative Pramila Jayapal, said on Tuesday. “The Congressional Progressive Caucus hereby withdraws its recent letter to the White House regarding Ukraine,” Jayapal said in a statement. She added: “The letter was drafted several months ago, but unfortunately was released by staff without vetting.” The letter became public on Monday, leaving some other Democrats feeling blindsided j…