Washington CNN  — 

Author Stephen King slammed Republican presidential candidate Donald Trump on Wednesday, suggesting the GOP frontrunner is running a racist campaign.

“How’s this for a Trump campaign slogan: IF YOU’RE WHITE, YOU’RE ALL RIGHT! ANY OTHER HUE, I DON’T TRUST YOU,” King tweeted on Wednesday.

Trump’s campaign has been roiled by accusations of bias amid Trump’s controversial comments that many illegal immigrants from Mexico are “rapists” and “killers,” and his campaign recently fired a longtime political aide for making racially charged Facebook posts.

King is an outspoken Democrat who has frequently thrown partisan jabs at other Republican politicians, including his own home-state GOP governor, Paul LePage, Florida Gov. Rick Scott and Trump’s fellow 2016 candidate, New Jersey Gov. Chris Christie.