Impeachment always starts in the House.
The sitting speaker of the House must give his/her approval for impeachment proceedings.
House committees investigate and write articles of impeachment.
If the Judiciary Committee approves any articles of impeachment, the full House will vote on the charges against the president.
A majority vote in the House must vote to impeach.
At least 218 out of 435 representatives must approve any of the articles of impeachment presented by the Judiciary Committee.
If the House impeaches the president, the Senate holds a trial.
At the outset, the Senate passes a resolution setting trial procedures and how to handle witness testimony, and evidence. Typically, members of the House Judiciary Committee manage the argument for impeachment and the president has his own defense lawyers on the floor
After the trial, the Senate votes.
A two-thirds majority, or 67 of 100 senators must vote for the president to convict and removed from office.