08:06Newsday2020/01/31 08:06 GMT: Trump impeachment: US senator moves to block witnessesBBC World Service Duration: 23 minutes Fri 31st Jan 2020, 08:06 on BBC World Service News InternetAvailable for over a yearListen nowLive news, business and sport from around the world. Show more GenresNewsFormatsMagazines & ReviewsBrandNewsday Source: BBC Online