Usually people over use the splitting the vote argument when it comes to awards because there is often one performance/role that truly stands out, even when multiple nominees in a category are from the same show. It more often occurs when their is no clear front runner, and it is a three way race, two of which come from teh same production. This year's Supporting Actress in a Musical category though, is the perfect example of the concept of splitting the vote. Although in most years people just
With the Nominees being:
Victoria Clark from Gigi
Ruthie Ann Miles from The King and I
and
Emily Skeggs
Judy Kuhn
Sydney Lucas
all from Fun Home.
As another commenter previously stated most voters do go in knowing the show their ballot is going to lean towards, unless their is a true stand out that everyone acknowledges, for example Patti LuPone winning over Kelli O'Hara, despite South Pacific's sweep of essentially every technical category. Voters clearly favored South Pacific over Gypsy, but LuPone was the clear favorite.
Although no one can say for sure, but as a previous voter said it looks like Fun Home was the clear favorite musical of the night winning the most awards with 5 wins in the 10 unique categories the show was nominated. So lets say 5 in 10 voters' ballots showed a preference toward Fun Home. The King and I on the other hand won 4 of the 9 categories in which it was nominated, so lets say that it was 4 in 9 voter's ballots show a preference for The King and I. This leaves only 1/45th of the vote unaccounted for which we will just give to Victoria Clark/Gigi fans. Therefore that 50% of voter's ballots that preferred Fun Home would be split among-st their three nominees. There was no clear favorite among their nominees, as many believed either Judy Kuhn or Sydney Lucas we both equally deserving, and Emily Skeggs was rewarded by being nominated. Even giving Skeggs 0% of the vote and playing the likely 65-35 split between Kuhn and Lucas, which could have gone either way means that the Kuhn and Lucas would only receive 32.5% and 18.5% percent of the vote compared to Miles 44.4% based on Ballot preference. Even if their 60% of ballots showed a preference for Fun Home which may have been likely considering their were 3 nominees in the category, that would mean the top nominee from Fun Home would receive only 39% of the vote compared to The King and I's 40% and that is with Skeggs receiving 0% of the vote which is not likely.
This is not to say Ruthie Ann Miles did not deserve the award, she gave a wonderful performance. It was a three way race between her, Kuhn, and Lucas. Fortunately for her the base of voters who preferred The King and I was solidly behind her, unlike her competition of Kuhn and Lucas, whose base of voters was split between them.