No, i don't think he misspoke.
He was being asked to denounce White Supremacy. I mean, you shouldn't even need to be asked to do this, but seems he does. As a President, he should have made an impassioned plea, direct, and to camera, in a clear and concise way if he was truly against it. We all know he isn't, and time and time again he has proved this, and he likes to stoke to fires and cause division, and this is exactly what he's done... again.
He'll be more than happy to see the reaction from the Proud Boys on Social Media.
Guys a c*nt. And getting worse.