Oil companies say a weeks-old Obama administration ruling that protects a Southwestern prairie bird has already halted oil-drilling operations in Kansas and is costing the U.S. economy tens of millions of dollars, as a GOP congressmen suggests the move is another “job-killing” attack on fossil fuel. The decision by the U.S. Fish and Wildlife Service that was announced in late March and took effect May 1 includes a provision that should allow federal officials and landowners in the five impacted states -- Colorado, Kansas, New Mexico, Oklahoma and Texas -- to manage conservation efforts. But oil producers say the interim...