"Gaps" in President Obama's leadership contributed to the collapse of a "grand bargain" on spending and debt last year, with the president failing to cultivate congressional relationships that may have helped him break through Republican opposition, author Bob Woodward told ABC News' Diane Sawyer.

Woodward's reporting in his new book, "The Price of Politics," reveals a president whom he said lacked the "stamina" in turning personal relationships with congressional leaders into action the way some of his predecessors have done.