Yes, the market cycles based on a plethora of influences at any give time. These include outside influences, and prior and current policies and laws enacted by or in spite of the president.
What chart are you looking at? Trump didn’t come in and magically make the market climb, it was climbing, steadily, since 2009.
I didn’t mash any numbers nor use any media outlets. Official numbers on calendar dates are not political. I took the actual numbers from Jan 20, 2009 through Jan 19, 2017. There is nothing to mash.
So Obama took over at a low point and is not at all responsible for 8 straight years of growth, but Trump took over an upwards trajectory is somehow fully responsible for 3 more years of growth? Is he responsible for the current decline too then?
But circling back to your first comment, to laugh and say that a good economy under one president is derangement but a good economy under the next is worth a vote. I question who is the deranged one.