Brian Schaffner co-authors analysis in the Washington Post [1]in which President Trump supporters are asked to identify which inauguration photos were captured at Trump's ceremony verses the past inauguration of Barack Obama.
The findings support that a significant number of Trump supporters mistake the photos in order to favor Donald Trump. 
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[1] https://www.washingtonpost.com/news/monkey-cage/wp/2017/01/25/we-asked-people-which-inauguration-crowd-was-bigger-heres-what-they-said/?utm_term=.996835d46ca8