What is the meaning of pct_trend_adjusted in FiveThirtyEight's polling data? I'm working on polling data from fivethirtyeight. What is the meaning of the pct_trend_adjusted column here? I understand that pct stands for percentage, but I don't get what the trend is that they are adjusting for, and how these figures are obtained.
Looking at the methodology provided by FiveThirtyEight, it seems as though this figure (i.e. polling figures on state level) is adjusted for trends in national polls. See differentiator 1 on the linked page for more info:

Basically, in states that haven’t been polled recently, we make
inferences about what’s going on there using national polls or polls
from other states that have been surveyed recently