Watch how the US Senate is debating impeachment hearings.
The Senate Judiciary Committee has invited witnesses to appear before it.
It is expected to vote to hear from the top two witnesses to the investigation, John Barrasso, Republican of Wyoming, and Donald McGahn, the Democratic chair of the committee.
They are the first people to be named in a criminal investigation into Russian interference in the 2016 US election.
The committee is also expected to announce whether to indict the president.
In his opening statement, Mr Barrasso said the committee was investigating allegations that Russia meddled in the election and he wanted to hear directly from those responsible for the meddling.
Mr McGahn said the hearings would be open to the public and that he had been invited to testify by his Republican colleagues.
“This is not a partisan process.
I am not here to tell you that I believe you should go to jail,” Mr McGahn told the committee, as it began questioning him about his involvement in the investigation.
“You may be charged with treason.
“The Russian interference, by all accounts, has been a serious matter and I think that this should be investigated and the American people should be informed.” “
What is the investigation? “
The Russian interference, by all accounts, has been a serious matter and I think that this should be investigated and the American people should be informed.”
What is the investigation?
The committee has not named a target but has made it clear that it is looking at any collusion between the Trump campaign and Russia.
What are the chances of a conviction?
Mr Barrasso and Mr McGhan have both been accused of being involved in a “cover-up” by Trump campaign officials and by Mr Trump himself.
Who is the witness?
There are no known witnesses to testify at the hearings.
Mr Barrackos lawyer, David Boies, has said the testimony will focus on Mr McGana, Mr McGawans relationship with Russia and his role in the campaign.
How will the hearings be conducted?
Members of the Judiciary Committee are expected to read a statement and then ask questions of witnesses.
They will be allowed one hour to question witnesses and one hour for questions.
Why is it important?
Although there is no evidence of collusion, the Senate is conducting its investigation into the Russian interference with the 2016 presidential election, including the possible involvement of the Trump camp.
Will there be a vote on whether to impeach Mr Trump?
If Mr Barraskos or Mr McGaan are found to have engaged in illegal conduct, they will face impeachment proceedings under the US Constitution.
If no action is taken, the issue will be referred to the House of Representatives for a vote.
Do I need to be present at the hearing?
Witnesses can attend hearings in person or via videoconference.
Are there cameras on the committee?
Yes, but they will not be allowed to film.
Is it possible to block the proceedings?
You can, but you will need to show your face and your name to the committee or anyone else present at your questioning.
Can I take notes?
No, you cannot record the questioning.
Can I use video recording equipment?
For video, there are no restrictions.
Where can I watch the hearings?
They will be livestreamed on YouTube.
Read more: The US Senate Judiciary committee is investigating Russian interference into the 2016 election