Public Policy Polling’s recent poll on conspiracy theories mostly showed up on my Facebook feed as “Four percent of Americans believe lizardmen are running the Earth”.
(of note, an additional 7% of Americans are “not sure” whether lizardmen are running the Earth or not.)
I think the results here can be explained by Lizardman's constant and an additional few respondents who interpreted the question to mean "Do you support Trump?" and then gave the answer that corresponded to supporting Trump.