Obama: 'Qaddafi Will Ultimately Step Down' (Video)

At the 4:30 mark, Williams asks Obama about his quote from 2007 saying 'the President does not have the power under the constitution to unilaterally authorize a military attack in a situation that does not involve stopping a actual or imminent threat to the nation." Obama responds 'we had to move quickly to save lives'

Visit msnbc.com for breaking news, world news, and news about the economy

President Barack Obama predicted Tuesday that continued military and diplomatic pressure will force Libyan leader Moammar Gadhafi to "ultimately step down."

In an interview with NBC Nightly News anchor Brian Williams a day after he addressed the nation to explain his Libya policy , Obama refused to rule out providing direct U.S. military assistance to the rebels fighting Gadhafi's government. But he said that was unlikely and that his comments shouldn't be interpreted as signaling wider U.S. intervention in the region.

"Gadhafi's been greatly weakened," Obama said. "He does not have control over most of Libya at this point, and so for us to continue to apply this pressure, I think, will allow us the space and the time to forge the kind of political solution that's necessary."

Obama said that nine days into the U.S. action in Libya, "The degree to which we've degraded Gadhafi's forces ... has been significant."

His comments came after U.S. ships and submarines were reported to have fired cruise missiles at Libyan missile facilities in and around Tripoli overnight.

"Our primary military goal is to protect civilian populations and to set up the no-fly zone," he said, but "we're not taking anything off the table at this point
If Obama's speech was so clear last night, why did he feel the need to go on NBC, ABC and the CBS evening news tonight?