The vast majority of blacks would not be considered "left-wingers". As a general rule - Ideologically they have more in common with their former southern democratic oppressors.
I think that depends entirely on what is meant by "left-winger"; within a traditional U.K context (which, sadly, the media doesn't like to use much these days...) most of them would be considered to be left wing. Within the usual U.S (and U.K media
) context, which places a huge amount of emphasis upon what are usual labelled (here at least) as "social issues", then, no, the vast majority of blacks are very clearly not "left wingers".