Seems that dems have theirs too: www.nationalreview.com
From the article:
But perhaps the most notorious gerrymandering is that of Maryland, whose third district has been described as a "broken-winged pterodactyl, lying prostrate across the center of the state."
Of all the gerrymanders, this is probably the most bizarre. And it is the Democrats dominating Maryland's assembly who ensure the state stays carved up to keep Republicans in the minority. In fact, only one Republican, Andy Harris, represents Maryland in the House. His district, the first, is massive, and encompasses more than a third of Maryland's total area.