Articles of impeachment must be passed by?

The articles of impeachment must be passed by a majority of the House of Representatives. The Senate then tries the impeached person and votes on their conviction. If two-thirds of the Senate votes on the person's conviction, they are convicted. Normally, in these trials, the Vice Presidents presides. However, in a case of the President being tried, the Chief Justice resides over the trial. This is because it is hard for a Vice President not to be biased if the conviction of the President means he will become the new President.