Complex sentence: As for the MAMA article, that certainly demonstrates that he was mayor but, as pointed out above by, being mayor isn't in itself notable, especially when the mayor is elected by a vote of other councillors rather than by a public vote.
Split into simpler sentences: As for the MAMA article, that certainly demonstrates that he was mayor but, as pointed out above by, being mayor isn't in itself notable. This is especially true when the mayor is elected by a vote of other councillors rather than by a public vote.