 Complete the following phrase:  In September 2017 Petersen was banned from Facebook during his senate campaign for giving away an AR-15 style rifle as a promotion and criticizing his Democratic opponent Claire McCaskills positions on gun rights. The ban was lifted after Fox News and the New York Post reported that Facebooks COO Sheryl Sandberg had made max donations to McCaskills campaign. The raffle drew renewed controversy in February 2018 when the 