Former Republican vice presidential candidate Sarah Palin seized Martin Luther King Day as an opportunity to lob vague criticism at President Barack Obama.

“Mr. President, in honor of Martin Luther King, Jr. and all who commit to ending any racial divide, no more playing the race card,” Palin wrote Monday on her Facebook page, after quoting from the civil rights icon’s famous “I Have A Dream” speech.

Obama said in an extensive New Yorker profile published this weekend that he believes “there’s no doubt that there’s some folks who just really dislike me because they don’t like the idea of a black President.”

“Now, the flip side of it is there are some black folks and maybe some white folks who really like me and give me the benefit of the doubt precisely because I’m a black President,” he added.

Palin didn’t point to any specific instances of the President playing the race card in the short post.