NEWARK, N.J. (AP) — Republican Gov. Chris Christie has vetoed a politically charged bill that would have banned the use of certain pig cages in his state, a move many observers see as aimed at appeasing Iowa voters ahead of a potential 2016 presidential run. In a veto message issued Friday, Christie called the bill opposing gestation crates a "solution in search of a problem." "It is a political movement masquerading as substantive policy," he said. The crates, which are so small that pregnant pigs can't turn around in them, have been criticized by animal welfare activists as cruel.