I think it's a meant to be tongue in cheek. However I agree that "Make $object $adjective again" is inextricably linked to the Trump campaign, so if anyone is using it I hope they realise that they'll be either be thought of as right-wingers or satirists by much of their audience.
Well, that would be evidence that it is quite extricably linked to the Trump campaign.
There is prior art for campaign slogans escaping the political world and transcending their original partisan meanings. "A chicken in every pot", "Don't Mess with Texas" ("slogan that began as anti-littering campaign; later adopted for political and other purposes" - Wikipedia), etc. Wikipedia also suggests it has been used prior to Trump, including by both Bill and Hillary Clinton (https://en.wikipedia.org/wiki/Make_America_Great_Again ).
