By Nathan Layne BLAINE, Minnesota (Reuters) -From the pulpit on Sunday, Father Joe Whalen exhorted his parishioners to avoid the kind of extreme partisanship and hate that appeared to be behind the killing of one of the church's own,

The shootings of two state lawmakers by a suspect with a “manifesto” of other political targets was an unprecedented act in Minnesota history. But it also comes at a divisive, volatile moment in U.S.