I can't find anything that doesn't model single elections, with rather muddy results ranging between weak (2010, with the Liberal Democrats picking up a few seats, but minor parties losing) and nothing (2015, due to UKIP not getting second choice support). (politics.stackexchange.com)
The 2016 election outcome significantly reduced the impact of Democrat office holders across the entire country, but with a single (c3headlines.com)
I would do the same for every single election I am eligible to cast a vote in. (religion.blogs.cnn.com)