David Hogg has been creating problems for DNC chair Ken Martin since he got the job as vice chair back in February. By April Hogg was using his PAC Leaders We Deserve to support primary opponents against moderate Democrats. By mid-May the DNC's Credentials Committee suggested Hogg and fellow vice chair Malcolm Kenyatta were elected in violation of party rules on gender diversity and should both have their wins voided. Today the party voted to hold new elections.In a 294-99 vote that concluded Wednesday, DNC members agreed to move forward with redoing the contest earlier this year that elected Hogg...