Dog-whistly

But the difference between the "bimbo ad" (which was also a Republican production) and the McCain advert is that the former was explicit in its miscegenation message, whereas the latter is more, well, dog-whistly.

Source: wiktionary

The dog-whistley Make America Great Again has given us Donald J. Trump, the great white hope, undoer of all-things-Obama.

Source: wiktionary

While there are reasons to complain about fireworks—they're loud, they can hurt people and cause fires—the tenor of the collective complaint becomes racialized and dog-whistly, spiked with cries for "law and order."

Source: wiktionary