A Republican senator, facing an unusually competitive race, whipped up a campaign ad to express her pride over her state of Nebraska. Only one problem — the footage she used was from Pennsylvania. “Nebraska is a great place to raise families, and I’ve worked hard to keep it that way,” said Sen. Deb Fischer’s (R-NE) voice in the ad, over aerial footage of a town square with an American flag flying in the center. But sharp-eyed people on social media immediately were skeptical that the footage was of Nebraska, with some speculating it was somewhere in the Northeast. And it turned out it was — sp…