Photo Illustration by Luis G. Rendon/The Daily Beast/GettyA staffer for Herschel Walker’s Senate campaign has alleged to The Daily Beast that longtime Republican activist Matt Schlapp made “sustained and unwanted and unsolicited” sexual contact with him while the staffer was driving Schlapp back from an Atlanta bar this October.The staffer said the incident occurred the night of Oct. 19, when Schlapp, chair of the American Conservative Union and lead organizer for the influential Conservative Po