good evening, chad. >> hey, bret. senate impeachment trial rules are vague. they only say that the senate meets six days a week, including saturday, starting at 1:00 and the senate reads aloud the house impeachment articles. >> the house of representatives is exhibiting to the senate of the united states articles of impeachment against william jefferson clinton, president of the united states. >> and the senate must hear from the house's impeachment matters. >> we the managers of the house are here to set forth the evidence. >> after that, almost anything can happen. >> impeachment trials of the president of the united states are extremely rare. you don't have a lot of precedent on which to rely. >> the potential is as yet the -- the lines are not on the field yet. i don't know if it's going to be 100-yard field or a 200-yard field and if you can get a series of first downs and keep