A resolution defining the rules for the further stages of the process is submitted for consideration.
US lawmakers on Thursday will hold the first vote in the impeachment investigation: the democratic-controlled House of Representatives will consider a resolution setting out the next steps in this fast-moving process.
The vote will be the first official test of the popularity of the investigation, which began on September 24. Democrats, who hold 224 seats out of 435, need a simple majority to pass the resolution.
The resolution provides for public hearings and the release of transcripts from private meetings and determines what rights Republicans and President Donald Trump himself have to participate in further stages of the process.
Republicans accuse Democrats of infringing on the President’s rights and express outrage over the closed nature of the investigation.
The Constitution gives the House of Representatives broad authority to set rules for investigations into impeachment, and Democrats insist they abide by the current rules. They promised to hold a series of public hearings as part of the investigation.