Article Photos: Obama is flexing his leverage on debt, immigration 2/3

President Barack Obama, accompanied by Vice President  Joe Biden, law enforcement officials, lawmakers and children who wrote the president about gun violence following last month's shooting at an elementary school in Newtown, Conn., pauses as he spoke about proposals to reduce gun violence, Wednesday, Jan. 16, 2013, in the South Court Auditorium at the White House in Washington.  (AP Photo/Susan Walsh)