John Stossel, one of the few broadcast network newsmen who wear their off-center politics on their sleeves, is leaving ABC, where he has worked for nearly 30 years, and heading to the fledgling Fox Business Network. In doing so, he will be leaving an outlet which attracts an audience in the millions and settling for one whose audience is too small to be counted. As co-host of ABC's 20/20 , Stossel frequently selects topics that jibe with his libertarian philosophy, often showcasing experts also linked to libertarian causes or are members of libertarian think tanks or taking to task those who advocate placing restrictions on free-market economics (like documentary filmmaker Michael Moore, who was on the receiving end of an aggressive attack by Stossel concerning Moore's film regarding the U.S. health-care system). Terms of Stossel's deal with the Fox Business Network were not disclosed. However, the network said that he will also make regular appearances on the Fox News channel.