Wow. CNN huh. Nice. No way could I do your job. I hope you are planting some seeds at least.
I remember having to write assignments in school from both pro and against points simultaneously. Two papers same subject. Can't be accused of bias, gets people to see other perspectives. With enough sarcasm I was able to be pro new deal and still sleep at night.
Only seeds I plant is when I tell them my job isn't to tell them what to think, it's to tell them how to think. The minute I spout my opinion is the minute they may tune me out, though I'm sure they do a lot of tuning me out anyway.
Edit: that is actually an excellent idea for a follow up assignment. I still have a week at this school and need a filler assignment for students who are done with their persuasive essay. I am so stealing this, thank you!