MONTGOMERY, N.J. - Barbara Lehman has lived in this central New Jersey community for 30 years, but her time here is nearing an end. She sent her children through Montgomery's well-regarded schools. And she enjoys the rolling landscape even as housing developments have spread across it in recent years. But her property taxes have climbed 56 percent since 2000 to a knee-buckling $14,000 a year — a heavy load for a high school French teacher whose salary goes up only about 3 percent a year. "Oh, it's terrible," Lehman said. Despite efforts by governors and lawmakers to do something about...