Matters pertaining to the proposing of constitutional amendments and the calling of a constitutional convention; ratification of amendments to the United States Constitution; the election of officers to state, local and school board positions; election commissioners, officers and precincts; qualifications, registration and purging of voters; regular elections; primary elections; presidential and congressional elections; special elections to fill vacancies; contest of elections; corrupt practices and election financing; election offenses and prosecutions; voting machines; absentee ballots; intergovernmental cooperation; state-federal relations; interstate compacts.