CQPolitics.com - When Republican voters in Illinois' 8th Congressional District go to the polls on Feb. 5 for their state's Super Tuesday presidential primary, they also will decide who will represent their party in one of its most important House races this year -- its bid to take back the seat in this typically Republican-leaning suburban Chicago district, which Democratic moderate Melissa Bean won in a big 2004 upset and then successfully defended in 2006.