public void GetData(string electionKey, string officeKey, string questionKey = null)
            {
                int?questionId = null;

                if (int.TryParse(questionKey, out var id))
                {
                    questionId = id;
                }
                DataTable = VotePage.EnableIssueGroups
          ? ElectionsPoliticians.GetCompareCandidateIssuesNew3(electionKey, officeKey,
                                                               questionId)
          : ElectionsPoliticians.GetCompareCandidateIssuesNew(electionKey, officeKey,
                                                              questionId);
            }