New York Times columnist Paul Krugman is author of the new book, “The Conscience of a Liberal.” Krugman teaches economics and international affairs at Princeton University and was recently named Columnist of the Year by Editor & Publisher magazine. He joins us the firehouse studio to talk about the Bush administration’s opposition to child health insurance and why universal healthcare has long been considered politically impossible despite the overwhelming support of a majority of Americans. Krugman also responds to Federal Reserve chair Alan Greenspan on the administration’s tax cuts and threats to Social Security. [includes rush transcript]