Where a disparate impact is shown, the plaintiff can prevail without the necessity of showing intentional discrimination unless the defendant employer demonstrates that the practice or policy in question has a demonstrable relationship to the requirements of the job in question.
The Chief Justice only presides at presidential impeachment trials and will serve as our example to illustrate the process. In non-presidential impeachment trials, the Vice President or Senate pro tempore (temporary president of the Senate) presides at the trial.
If the Vice President did not preside over an impeachment (of anyone besides the President), the duties would fall to the President pro tempore of the Senate. To convict the accused, the concurrence of two thirds of the members present is required. Conviction removes the defendant from office.