In less than two minutes, I found three articles about the US Whip in Congress. If I can do it in 2 minutes - you can do it in five (you must prepare for mock exams/class). See the below articles:

http://www.usnews.com/articles/news/politics/2007/12/06/qa-with-new-senate-minority-whip-jon-kyl.html

http://projects.washingtonpost.com/congress/members/c000537/

http://www2.counton2.com/cbd/news/state_regional/article/clyburn_reelected_majority_whip_for_111th_congress/17033/