Gallup: Democrats are much less informed about IRS scandal and also think that the matter is less serious and that Obama doing a good job on it

More information on the Gallup poll is available here.  Republicans are following this scandal the most closely and think that Obama is doing the worst job, followed by independents who are following it the next closest and finally Democrats.

The question is one of causation here.  Do Democrats not follow this because they don't believe it will prove to be significant or are to they not realize that it is significant because they aren't following it?  Or are both true?