Here are links to Tutorials, political cartoonists, general artists, and sites of interest.
New Zealand Cartoon Archive
New Zealand Cartoons Org.
NZ Parliment and cartoons
Andrew Tishler Artist. Well worth visiting his website for oil painting instruction. His videos are a must to watch. He now resides in New Zealand.
Andrew Tischler (one helluva talented artist)
Proko will teach you how to draw caricatures, well worth a look.