[michaelchisari]

For mid-term elections, yes, they usually swing against the party in power. The extent to which they swing varies wildly, though, so all we know is that there likes will be a traditional anti-establishment swing, but the magnitude of it is unknown.

However, a special election within the months after a Presidential election should follow the same results, since there hasn't been the time to build the resentment necessary for a significant change in voting patterns. That, however, has not been the case with the Trump presidency.

[flukus]

That mirrors our experience after the 2013 federal election, the fell hard and fast but changed the leader and still snuck through at the last general election.

We've also seen the trend at state level for the last few years, it seems swings are coming harder and faster.