Robert Menendez, the disgraced former U.S. senator from New Jersey, should spend at least 15 years in prison following his corruption conviction, after he betrayed voters by putting his office "up for sale" in exchange for bribes,

Prosecutors say former U.S. Sen. Bob Menendez should be imprisoned for 15 years after the Democrat became the first to be convicted of abusing a Senate committee leadership position and the first public official to be convicted of serving as a foreign agent.