A portrait of Bobby Jindal sparked a controversy (Is Bobby Jindal White?) because the artist deviated from his skin color. Bobby Jindal's skin color is dark-brown (due to his Indian ancestry.) A case-study on the importance of replicating the skin-color in portraits and caricatures (caricatures do provide the artist with some degree of freedom to choose colors and proportions, but a portrait must be a true representation of a person's look.
The caricature that made me go on the Fluharty treasure hunt :)