With the presidential primary season now underway, the season of political campaign ads is also in full swing. On Sunday, some football fans in Pennsylvania watching the NFL playoff game between the Detroit Lions and the San Francisco 49ers will see a minute-long ad attacking Donald Trump as he seeks a third Republican nomination for president. Made by VoteVets, a progressive political action committee that advocates for veterans and military families, the ad criticizes Trump for past comments where he disparaged veterans and soldiers. The ad includes quotes attributed to Trump where he called fallen soldiers “losers” and “suckers.” The...