The Democrats have announced that they will begin a formal impeachment inquiry into President Donald Trump after claims he sought political help from Ukraine.
The decision was announced by congresswoman Nancy Pelosi, after allegations that President Trump had pressured the leader of Ukraine to investigate Joe Bidens family, it is claimed.
Ms Pelosi said: The actions taken to date by the president have seriously violated the Constitution.
She added that Mr Trump must be held accountable. No one is above the law.
The speaker of the House of Representatives added: The actions of the Trump presidency revealed dishonorable facts of the presidents betrayal of his oath of office, betrayal of our national security, and betrayal of the integrity of our elections.
Ms Pelosi had for months resisted calls to start the impeachment process, but with growing calls from party members, she has decided to launch the inquiry.
Democrats are demanding information about whether President Trump improperly pressured the Ukrainian president to investigate Mr Biden and his son, partly by withholding foreign aid.
President Trump insists he did nothing wrong and said he will release an unredacted transcript of a call with Ukraines leader on Wednesday.
More than 170 of the 235 Democratic members of the House are now thought to support impeachment.