"If @RalphNortham is one of the two people pictured in the highly disturbing, horrific photo wearing either blackface or a KKK hood — or if he selected or approved of its use on his yearbook page — he should immediately resign," MoveOn, a progressive political advocacy group said on Twitter.
"There are no excuses for such a racist display."
Since their original statement, the group has launched a petition urging Northam to "resign immediately."