Q:

Clarifying tags election, voting, and president

Considering the raising interest towards ongoing presidential elections in the USA, I'd like to clarify using election, voting, and probably president and voting-systems tags. The last two, in my opinion, are not that much abused, however.
Many questions are being unadvisedly tagged with several/all of those, and this makes searching by tag pretty difficult.
We also know that "Tags should help to describe what the question is about, not just what it contains."
Also, this resembles typical problems of tagging questions at StackOverflow: Should jQuery questions always be tagged with “javascript”? (personally, I'm not very convinced by Shog9's answer, but this is the way how the things are).
Is there a plain English description of which tag should be used?
I have my own (naive) understanding of these, but I'm afraid my English wouldn't let me make a good writeup on this topic.

I don't know if this is a separate question or not, but democratic-primary and republican-primary seem to be so much narrow.

A:

I would consider the voting-systems tag to be used incorrectly often.  E.g. 

Is it true that Republicans have an unfair geographical advantage in elections for the House of Representatives?
What was the largest popular vote election ever held?
Is there any mechanism in USA to prevent someone from voting by mail AND in person?
How can a primary's winner be declared with 0% reporting?
Why don't I need ID to vote in the UK
How do the Iowa caucuses differ from other elections in voter behavior?
What is the process behind the Democratic Iowa Caucus?
third US (major) political party
In what issue was Barack Obama the only dissenting vote
Why don't political parties support independent candidates to the extreme of their opponent to split the opposition vote?

To me, a voting system is something like first-past-the-post or proportional representation.  These questions seem to be using it as a placeholder for political theory or analysis.  Hey, there's voting -- it must be a system!  
Note that the Obama question is especially egregious, as it is entirely a point of political trivia related to how one politician voted.  It doesn't touch on voting theory at all.  
Here's my proposal for the tag wiki excerpt (what shows when you hover over the tag):  

For questions about rule systems for gathering and counting votes. Not for questions about country-specific rules but for the theory and practice of voting systems. Examples include proportional-representation and first-past-the-post. 

