“when people like Trump don’t wear masks and make wearing masks a political issue, their supporters are less likely to wear them. When the president says people wear masks as a way of showing their disapproval of him, “that’s a pretty clear signal, not just that he’s not modeling responsible behavior, but that he views it as a sign of disloyalty,” Wiley said. “That does definitely further politicize the decision to wear a mask or not.”
The effects of this politicization can be seen in recent polling on mask use. In a Pew poll conducted June 4 to 10, 76 percent of Democrats and Democratic-leaning voters said they wear a mask in stores all or most of the time. Just 53 percent of Republicans and Republican-leaning voters said the same.”
https://www.vox.com/2020/7/21/21331310/mask-masks-trump-covid19-rule-georgia-alabama