Not exactly sure what the title means, but this is very interesting.
Caitlyn, being a PoliSci major, would know all about proportional representation, and as a Poly Sci major and cheerleader, would know all about representation of proportions.
PR, as it's commonly known, is a method of electing legislators that depends on the proportion of votes received by party. So, if Party A receives 33% of the vote, and the legislature consists of 200 members, that party gets 66 seats. This contrasts with the Westminster-style method of "first past the post" election (which is also used in the USA), whereby the jurisdiction is divided geographically and the highest vote-getter in any particular riding (or district, to use the American term) gets the seat. Continental European countries tend to have PR systems, so majorities are very rare in those countries. Britain and its former colonies (e.g., Canada) tend to have more majority governments, because it's possible to put together a majority government with a plurality of votes.
[/nerdy explanation over]
Sorry, I couldn't resist that. I'm Canadian and we've got an election going on right now, and Caitlyn's thoughts on this are far more interesting than the advertising I have to put up with.