Rarely does a story hit with the impact of former Washington Post reporter Jose Antonio Vargas’s revelation in the New York Times magazine Wednesday that he is an undocumented immigrant. Within minutes of it appearing on the Times’ website, it burned across Twitter like wildfire, pushed along each time with passionate endorsements from influential journalists. Meanwhile, ABC News blasted excerpts from its exclusive interview with Vargas, which will air on “World News” and “Nightline” tomorrow and “Good Morning America” on Friday.... The Post, the paper that hired Vargas as an intern, put him on a team that won a Pulitzer...