Former US vice-president Joe Biden in stills from a video in which he pledges to be “more mindful about respecting personal space in the future”. Photograph:  Joe Biden/Handout via Reuters.

This week the Democratic race to become the party’s nominee in next year’s presidential election took an uncomfortable turn as Joe Biden came face to (...)

Former US vice-president Joe Biden at the Democratic National Convention in Pennsylvania in 2016. His aides he will not be dissuaded by the allegations from entering the presidential race. Photograph: Nicholas Kamm/AFP/Getty Images

Nancy Pelosi, the Democratic speaker of the US House of Representatives, offered a measured defence of Joe Biden on Tuesday, arguing that the allegati(...)