Just to review an older idea of mine, in determining how to evaluate an economy. Technological and worldwide events are the largest factors, but we all unreasonably ignore those. As for the politics, the composition of Congress has about twice the weight as the occupant of the White House. Changes in either can do a great deal to change perceptions in the populace, however, which in turn creates changes in the economy. Confidence matters.
Then, an 18-24 month delay should be applied between dates of taking office and practical changes. Legislation takes time, and even executive orders don’t play out immediately.
Feel free to disagree, but I think this gives a clearer picture of what’s happening than our usual tracking of the economy from the day our public servants took office (or even the day they were elected!) until the day they left.