Two students from the Twin Cities are watching President Clinton's Impeachment Trial from the exclusive confines of the Senate Press office. Tara Zapp of St. Paul's Central High is filing stories for the Humphrey Forum Youth News Service. Thanks to a little help from Minnesota Republican Senator Rod Grams, she managed to snare a press pass. I asked Zapp to describe today's action, beginning with House Manager Asa Hutchinson's call to bring witnesses.