The short answer is that not much has changed, including the perceptions of change (e.g. "HN is becoming 2005 Slashdot" - https://news.ycombinator.com/item?id=6157485 - August 2013.)
If anyone wants to understand our thinking about political topics on HN, here are some links:
https://news.ycombinator.com/item?id=21607844
https://news.ycombinator.com/item?id=22902490
or you can look at these past explanations: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&so...
p.s. In case anyone's worried, no, we're not letting (or going to let) HN be taken over by politics. The proportions are stable and carefully regulated, although there is fluctuation, as with any stochastic process.