Racial prejudice has declined as a reaction to Trump’s presidency, a new study suggests

Donald Trump began his campaign for the presidency by branding Mexicans as “rapists.” He initially declined to denounce David Duke, the former grand wizard of the Ku Klux Klan. One week after his 2017 inauguration, the president temporarily banned people from seven mostly Muslim countries from entering the United States. That summer, he said there were “very fine people” among torch-wielding white supremacists who descended on Charlottesville.

Now, those who are seeking to deny President Trump a second term say their mission is not only replacing him in the Oval...