Weeks of one-sided stories pushed by professional agitators like Al Sharpton have had an effect on public opinion. Last weekend, (3/25-3/26) CNN conducted a poll which showed 73% of adults believed Trayvon Martin's shooter George Zimmerman should be arrested. Now a new poll by WPA opinion dynamics finds that number has dropped sharply in just the last few days: Our poll conducted Tuesday and Wednesday revealed that just 48% of Americans believe he should be arrested. Our poll matched the partisan distribution of the CNN poll, so this is a real and significant change in opinion as more key details...