The Latest: Source says Pelosi to pursue Trump impeachment

House Speaker Nancy Pelosi plans to announce a formal impeachment inquiry of President Donald Trump over allegations that he pressured the leader of Ukraine to investigate Joe Biden's family.Pelosi's likely decision was described to The Associated Press by a person familiar with the decision who was not authorized to speak publicly and spoke on condition of anonymity.Pelosi is set to make an announcement at 5 p.m.