The choice is made easy in part by Mr. McCain’s disappointing campaign, above all his irresponsible selection of a running mate who is not ready to be president. It is made easy in larger part, though, because of our admiration for Mr. Obama and the impressive qualities he has shown during this long race. Yes, we have reservations and concerns, almost inevitably, given Mr. Obama’s relatively brief experience in national politics. But we also have enormous hopes.

Mr. Obama is a man of supple intelligence, with a nuanced grasp of complex issues and evident skill at conciliation and consensus-building. At home, we believe, he would respond to the economic crisis with a healthy respect for markets tempered by justified dismay over rising inequality and an understanding of the need for focused regulation. Abroad, the best evidence suggests that he would seek to maintain U.S. leadership and engagement, continue the fight against terrorists, and wage vigorous diplomacy on behalf of U.S. values and interests. Mr. Obama has the potential to become a great president. Given the enormous problems he would confront from his first day in office, and the damage wrought over the past eight years, we would settle for very good.

Read the Washington Post endorsement of Obama.