From the 1889 Keystone bridge, a fisherman stands along the Turkey River which runs through downtown Elkader, Iowa on Friday April 13, 2018. In 2016...In the Upper Midwest encompassing more than three dozen counties along or adjacent to the Mississippi River. In 2016, the American voters in these districts shifted, in some cases dramatically, to the GOP nominee after backing Democratic presidential nominees in at least six consecutive elections. In eight of the counties, voters had picked Democrats at least 10 elections in a row before backing Donald Trump for President.