Responding to investigation of claim he tried to strong-arm the Ukrainian president into providing dirt on Joe Biden, US president says Democrats 'want to take away your freedom'

After US president implies those who helped his accuser should be executed, Democratic House committee chairman warns him against 'witness intimidation'

In phone call central to impeachment inquiry, US president asked Volodymyr Zelensky 'to do us a favor,' said 'there's a lot of talk about Biden's son'

Pelosi and rookie Congress members with national security backgrounds get behind formal impeachment proceedings despite risk to some closely fought districts

More Democrats push for impeachment as further details emerge of events surrounding conversation in which US president discussed 2020 presidential rival with Ukrainian leader

US president expected to push for pressure on Tehran, while at home he faces fresh threats of impeachment over dirt-digging against 2020 presidential rival

US president says July phone call with newly elected Zelensky focused on Ukrainian corruption; he cited the former US veep and his son, a local gas company board member, as example

US president reportedly turned to Ukrainian leader Volodymyr Zelensky in bid to piece together a corruption complaint against Joe Biden ahead of 2020 race

Ex-VP calls on US president to release transcript of phone call with Volodymyr Zelenskiy, sends out fundraising appeal denouncing 'this gross abuse of power'

Latest slip of the tongue by 76-year-old former VP comes amid questions about his age and mental clarity