I have not seen it used much but “racer” makes a lot of sense to me to describe someone who uses race and race-baiting to disparage conservatives.
http://ca.answers.yahoo.com/question/index?qid=20110429165000AAt4yTd
Good catch it is an up and coming term used to describe many dems who run out of excuses for their sides incompetence.
If he says, "Some would call it that", say, "Please name some so we can identify the racer(s)." Bottom line, we definitely have to take it to them every time they pull this crap.