The Iowa caucuses are set for February 1, 2016. The primary is February 9 , 2016 in New Hampshire. Primaries and caucuses continue in various states until mid-June. See http://www.uspresidentialelectionnews.com/2016-presidential-primary-schedule-calendar/for the complete schedule.
I am guessing you mean electors for the presidential election. These people usually do not have their names on the ballot but there are sworn to vote for one of the candidates who is running president and whose name is on the ballot. So when you vote for a presidential candidate, you are really voting for his slate of electors.
each party nominated presidential and vice-presidential candidates
Yes, the personal qualities of presidential candidates are important in an election. Voters often consider qualities such as honesty, integrity, leadership skills, and ability to make sound decisions when choosing a candidate. These qualities can influence voters' trust, confidence, and perception of the candidate's ability to fulfill their responsibilities as president.
Do the voters elect electors not the presidential candidates
In a presidential election where the candidates are from either the republican or democratic parties, that would indeed be the logical conclusion of their voting choices.
Richard M.Nixon/Spiro Agnew George McGovern/R.Sargent Shriver
how do voting trends affect presidential and congressional power?
The candidates could bribe the people voting.
Voting.
Primary elections are preliminary elections for the purpose of choosing the candidates for the main elections that actual choose the office-holders. The term "state primary" may refer to an election held within a state to choose candidates for the presidential election or it may refer to primaries held to choose candidates for state offices.
national conventions for nominating presidential candidates.
There was no Presidential election in 1950.