I saw there are quite a few questions about Conservative Party leadership elections. These are elections in which party members choose their party leader.
A few existing tags come to mind, but they don't fit perfectly:
The election tag is normally used to refer to elections in which the general public votes for candidates representing different parties.
The primaries tag covers elections in which party leaders are chosen, but the term primary is not common everywhere. I think it's mostly a US politics term, though there may be other countries that also it.
I can see two options, but they each have their pros and cons:
Since UK party leadership elections are the UK equivalent of primaries in the US, the primaries tag could be expanded to include UK leadership elections and other internal party elections in other countries. The main tag could be renamed to be more inclusive and country-specific names could be added as tag synonyms.
The benefit of this option is that similar processes of electing party leaders are grouped within the same tag.
The downside is that we can only have one tag name which shows as the main tag. When talking about the US, the term primary makes the most sense though it does not for some other countries. A generic term may seem out of place for most countries.
The benefit of this option is that the tag makes sense on those questions.
The downside is that questions covering similar processes in different countries are across two different tags.