Donald Trump has tried to undermine claims that a US diplomat overheard him on the other end of a phone call to an ambassador – tweeting a bizarre message while the diplomat was giving evidence at the impeachment hearings.
The president tweeted: "I have been watching people making phone calls my entire life. My hearing is, and has been, great. Never have I been watching a person making a call, which was not on speakerphone, and been able to hear or understand a conversation. I've even tried, but to no avail. Try it live!"
The tweet was sent while David Holmes, a State Department official, was reading his opening statement in the latest public hearings in the impeachment inquiry.