Lewisberry, Pennsylvania - Sitting in the bar of a roadside restaurant with a friend, Rick Shaffer sums up what he thinks of the situation in this northeastern US state with three words: "We need change." Shaffer and his friend, both construction workers in their 50s, support Donald Trump, the Republican presidential candidate. They believe the United States needs a strong military and that undocumented immigrants should be deported. "Why build a wall? Landmines will do the same!" Pennsylvania has backed the Democratic presidential candidate in every election since 1992. Even so, the state is "not reliably Democrat", says political analyst...