About a dozen people gathered to hear from 6th Congressional District candidate Sean Casten at a forum Tuesday hosted by Crystal Lake Chamber of Commerce. The Democrat from Downers Grove will face incumbent Peter Roskam, R-Wheaton, in November's general election. Casten is a proponent of clean energy and environmental sustainability who co-founded Westmont-based Recycled Energy Development LLC. Casten also has an educational background in science, biochemistry and engineering. Audience members asked Casten about his views on immigration, health care, tariffs, taxes, income inequality, the opioid crisis, legalization of marijuana and equal rights in the workplace for women and the LGBT community. Casten said his background in business has prepared him for a role in Congress. "Ultimately, like anybody who has had some degree of business success, you learn to make decisions based on fact, no matter how uncomfortable those facts are," Casten said.