An attorney for Georgia voters and political candidates challenging absentee ballot rejections in one of the state’s most populous counties says the reported rejections are “just the tip of the iceberg.”

Atlanta attorney Bruce Brown said reports by Secretary of State Brian Kemp that half of Georgia’s counties—including some of the state’s most populous—have not rejected any of the thousands of absentee applications or ballots in advance of the Nov. 6 election are “implausible.”