DENVER—The Colorado sheriff whose county includes the movie
theater where 12 people were shot and killed last year says law-
enforcement officers have no right to ignore gun-control laws
unless the courts rule them unconstitutional.  Arapahoe County
Sheriff Grayson Robinson issued a statement Tuesday criticizing
police and sheriff's officials who have said they would not
enforce gun-control laws they consider unconstitutional.  Weld
County Sheriff John Cooke has said he wouldn't enforce any of
Obama's plan to address gun laws, and sheriffs in at least four
Oregon counties said in a letter to Vice President Joe Biden
they wouldn't work with federal officials to enforce potential
gun laws they consider unconstitutional.  Gun control was thrust
back into the national debate after the mass shootings at the
theater in the Denver suburb of Aurora in July, and at a school
in Newtown, Conn., in December, where a gunman killed 27 people,
mostly young children.  President Barack Obama has proposed a
series of measures t