This report analyzes the health care proposals of eight Democratic and Republican 2008 presidential candidates—Hillary Clinton, John Edwards, Rudolph Giuliani, Mike Huckabee, Dennis Kucinich, John McCain, Barack Obama, and Mitt Romney. Their approaches to health insurance reform fall into three categories: 1) proposals that emphasize tax incentives for obtaining insurance through the individual market (Giuliani, Huckabee, McCain, Romney); 2) proposals that build on existing private and public group insurance with shared responsibility for financing coverage (Clinton, Edwards, Obama); and 3) proposals that aim to cover everyone through publicly sponsored insurance systems like Medicare (Kucinich). The report examines differences among the proposals, and evaluates them against key principles like affordability, provision of essential services, financial protection, streamlined administration, and fair financing.