Presidential historian Doris Kearns Goodwin won the Pulitzer Prize for No Ordinary Time: Franklin and Eleanor Roosevelt: The Home Front in World War II and the author, most recently, of Team of Rivals: The Political Genius of Abraham Lincoln.

Historian Doris Kearns Goodwin explains why President Obama’s health-care reform legislation is in the same category as Social Security and the civil-rights bill.

In some ways, Obama has outperformed Kennedy, the president to whom he’s most often compared. But Doris Kearns Goodwin argues his gains are offset by his tenuous hold on his base.