All public policies are related. Okay, that may be a slight overstatement, but there's a point here. A politician's credibility on one public issue -- and thus the disposition of that issue -- will often be determined by his or her position on other issues. People will look at a politician's full program as a way of judging good faith. Case in point: the Bush administration's announcement that it will limit the states' ability to extend medical coverage through the State Children's Health Insurance Program (SCHIP) to families that do not qualify for poverty programs because they make too much money.The rest of this week's "TGIF, Bad Policy Drives Out Good," is at the Foundation for Economic Education website.