RE: I think the proper answer is: I want to make America great again.
Sure, anybody can use that slogan. Even Bernie Sanders can.
Campaign slogans should be both innocuous and imbed a key point of the campaign for those who can handle it.
Make America great again. The “again” part implies America was great. So, I doubt Bernie could use it. Marxists might see capitalism as a stage in societal evolution (they argue over whether capitalism is or isn’t a necessary stage). So, they wouldn’t use “again” in a slogan.