Bari Weiss startled “60 Minutes” staffers during a private meeting last week by asking why Americans view the show as biased — another sign of the new CBS News chief’s aggressive approach to reshaping the network, according to a report. Weiss “surprised senior staff … when she asked a provocative question: Why does the country think you’re biased?” the New York Times reported on Sunday , citing three people who attended the Midtown Manhattan session. The exchange was met with “stunned