Actually that is 29 minutes allotted to each Senator for trashing the candidate in a spiteful,juvevillesque name calling put down diatribe, with one minute for asking some asinine question that the Senator hopes the candidate will appear inept in answering.
It's like a grammar school roast, with the class clowns roasting the honor student.
I intended to add that the Senate is commandering far more authority here than the founding Fathers ever intended. Therefore we need a Constitutional Amendment requiring that US Senators win their seats in Nation wide elections.