[Illustration by ALEX FINE] ASSOCIATED PRESS: A conservative activist who posed as a pimp to target the community-organizing group ACORN and the son of a federal prosecutor were among four people arrested by the FBI and accused of trying to interfere with phones at Sen. Mary Landrieu’s office. Activist James O’Keefe, 25, was already in Landrieu’s New Orleans office Monday when Robert Flanagan and Joseph Basel, both 24, showed up claiming to be telephone repairmen, U.S. Attorney Jim Letten’s office said Tuesday. Letten says O’Keefe recorded the two with his cell phone. Flanagan, the son of acting U.S. Attorney Bill […]