David Plouffe: Obama to say founding principles 'still can guide us' WASHINGTON, Jan. 21 (UPI) -- President Barack Obama was to deliver a "hopeful" inaugural address, a senior White House adviser said ahead of Monday's ceremonial swearing-in and public pomp. "I think it's going to be a hopeful speech," David Plouffe told CNN's "State of the Union." I will let the president speak for himself, obviously. But what he is going to do is, I think, remind the country that our founding principles and values still can guide us in a changing -- a modern world. Plouffe, who became Obama's senior adviser in 2011 after David Axelrod resigned to start Obama's re-election campaign, said he believed the president would "talk about the fact that our political system doesn't require us to resolve all of our disputes or settle all of our differences, but it does compel us to act where there ... is common ground. He is going to make that point very clearly. He added people should look at Obama's inaugural address and his State of the Union speech in three weeks as "a package." "In the inaugural address he is really going to lay out his vision for his second term and where he thinks the country needs to go in the years ahead, the values undergirding that, and then obviously a detailed agenda and blueprint in the State of the Union," Plouffe said. Obama was to take the oath of office on the western front of the U.S. Capitol at 11:30 a.m. His ceremonial swearing-in, on the Martin Luther King Jr. Day federal holiday, comes a day after he took the oath in a private White House ceremony, opening his second term. The Constitution mandates presidential terms begin Jan. 20. When the date falls on a Sunday, the public ceremony traditionally is held the next day. Supreme Court Chief Justice John Roberts administered the private oath to Obama at 11:55 a.m. Obama stood with his wife, Michelle, his two children and a small audience. Vice President Joe Biden was sworn in by Justice Sonia Sotomayor at 8:21 a.m. Sunday in a separate ceremony at his official residence at the U.S. Naval Observatory about 2 miles from the White House. Sotomayor was the fourth woman and the first Hispanic to administer the oath to a president or vice president. "I did it," Obama said to his youngest daughter, Sasha, after taking the oath. "You didn't mess up," Sasha responded, as Obama chuckled and almost rolled his eyes as he turned and waved to thank the small group of witnesses before leaving the room. Sasha's quiet comment referred to four years ago when Roberts and Obama flubbed the oath at the public ceremony and did it again privately to make sure all constitutional obligations were met. Sunday's ceremony lasted about one minute. Organizers said Monday's crowd was expected to be far smaller than the estimated 1.8 million who braved bitter cold four years ago for Obama's first inaugural. Monday's ceremony was to feature an original poem from Richard Blanco, who at 44 is the youngest inaugural poet and the first Latino to serve in the role. Kelly Clarkson, James Taylor and Beyonce were to perform. Obama was to have a luncheon with lawmakers on Capitol Hill afterward, followed by a review of a review of a military procession. He and the first lady were then to lead the inaugural parade from the Capitol to the White House. He was to watch the rest of the parade from a reviewing stand. In the evening were to be two official inaugural balls at the 10-year-old Walter E. Washington Convention Center, which President George W. Bush used for inaugural balls at his second inauguration in 2005. The Monday night talent lineup was to include Alicia Keys, Soundgarden and Usher.