"And yet this truth must coexist with another — that no matter how justified, war promises human tragedy. The soldier's courage and sacrifice is full of glory, expressing devotion to country, to cause, to comrades in arms. But war itself is never glorious, and we must never trumpet it as such."

The Oslo speech was widely praised. It was an exception in that way; in his first term, Barack Obama rarely delivered the kinds of extraordinary speeches that sent him to the White House in the first place. Instead, he offered well-written, logical addresses that were rarely memorable. The irony: Elected as a master communicator, he is sometimes criticized for failing to use his skills to enlist the public in his causes, like health care reform.

"Most people thought he would let his rhetoric do the work for him," says Douglas Brinkley, a historian whose books include biographies of Gerald Ford and Jimmy Carter.

But "he hasn't told his story well enough," Brinkley says. Obama himself has said as much: "The mistake of my first term — couple of years — was thinking that this job was just about getting the policy right," he told CBS' Charlie Rose in July. "But the nature of this office is also to tell a story to the American people."

Many thought that in electing Obama, Americans had chosen a president who would be bold and steadfast in pressing his agenda. Instead, he has drawn criticism from both the right and the left for being too coy, too willing to step back and let others lead.

"Instead of drawing clear lines and putting forward detailed proposals," conservative columnist Ross Douthat wrote in The New York Times after the debt ceiling fiasco, "the president has played Mr. Compromise — ceding ground to Republicans here, sermonizing about Tea Party intransigence and Washington gridlock there, and fleshing out his preferred approach reluctantly, if at all."