Pornographers are bracing for the first major obscenity clampdown in three decades under President Trump’s new pick for attorney general, William Barr, a strident social conservative whose views threaten the lucrative industry. Anti-porn campaigners were thrilled with Trump's selection of Barr, previously attorney general under President George H.W. Bush, noting his enthusiastic obscenity prosecutions in the early ‘90s. Pornographers are taking the threat seriously, but argue a crackdown would be hypocritical under the thrice-married Trump. His links to the industry include softcore Playboy cameos, an alleged affair with Playmate of the Year Karen McDougal, an alleged tryst with hardcore star...