President Obama is hitting the airways tonight to sell his health care reform plan. The Takeaway’s man in Washington, Todd Zwillich, gives us the behind the scenes report. We then turn to Paul Starr, professor of sociology and public policy at Princeton, to explain the history of presidential attempts to change the American health care system. Mr. Starr was a senior health policy adviser in the Clinton White House and is author of the Pulitzer-Prize winning book The Social Transformation of American Medicine: The rise of a sovereign profession and the making of a vast industry.