Nothing contained in sections 5-266a to 5-266d, inclusive, prohibits political activity by such persons in the classified service in connection with (1) an election and the campaign preceding such election if none of the candidates is to be elected at that election as representing a party any of whose candidates for presidential elector received votes in the last-preceding election at which presidential electors were selected; or (2) a question which is not specifically identified with a national or state political party. For the purpose of this section, questions relating to constitutional amendments, referenda, approval of municipal ordinances, and others of a similar character, are deemed not specifically identified with a national or state political party.