Opinion editor's note: Star Tribune Opinion publishes letters from readers online and in print each day. To contribute, click here . ••• This Independence Day marks a step backward for our secular nation. A recent slate of rulings from our conservative-leaning Supreme Court have eroded the wall of separation between church and state that our founders constructed nearly 250 years ago. In the past month, the high court has ruled in support of tax dollars for religious schools, prayers during football games, and against a woman's right to choose whether to continue her pregnancy. This religious-leaning court and its rulings...