AAA Jan. 17, 2013 12:40 PM ET Four years in, shifts in Obama strategy, outlook By NANCY BENACBy NANCY BENAC, Associated Press FILE - These file photos, Oct. 7, 2009, left, and Nov. 28, 2012, right, shows President Barack Obama speaking in Washington. Four years after he was the fifth-youngest president to take the oath of office, Barack Obama now is 51, his hair more gray, his face more lined. The changes aren't all physical: As he enters Term Two, he is sounding more confident, vowing a harder line on negotiations, relying more on trusted allies, promising less, expressing more cynicism about the grip of partisanship on Washington. And perhaps most important, he seems more convinced of a need to keep the public with him, coming full circle to his people-driven 2008 campaign. FILE - This Dec. 14, 2012 file photo shows President Barack Obama pausing as he speaks about the school shooting in Newtown, Conn., in the briefing room of the White House in Washington. FILE - This Jan. 20, 2009 file photo shows President Barack Obama delivering his inaugural address on Capitol Hill in Washington. AP Photo/Jae C. Hong, File FILE - This Dec. 16, 2012 file photo shows President Barack Obama pausing as he speaks during an interfaith vigil for the victims of the Sandy Hook Elementary School shooting, at Newtown High School in Newtown, Conn. AP Photo/Evan Vucci, File WASHINGTON (AP) - Four years ago he was the fifth-youngest president to take the oath of office. Barack Obama now is 51, his hair more gray, his face more lined. And the changes in the president aren't all physical. As he enters Term Two, he is sounding more confident, vowing a harder line on negotiations, relying more on trusted allies, promising less and expressing more cynicism about the grip of partisanship on Washington.