ABC News was called out by a former employee and several other viewers on Sunday after platforming a controversial Republican pollster to talk about division in U.S. politics. Republican strategist Frank Luntz, who previously predicted that “voters will resent” Trump after he was found liable for business fraud, appeared on ABC over the weekend. The spot was hosted by chief global affairs correspondent Martha Raddatz, and it focused on the upcoming presidential debate between Donald Trump and President Joe Biden. “If we have another reaction like that first 2020 debate, where the two candidate…