Update: Finally, information on the actual magnitudes of the districts! The LA Times has posted a PDF with a useful map.
Even though some advisers concede that Hillary Clinton will probably win California, Barack Obama’s campaign will heavily target a number of large-and-small, odd-and-even congressional districts in the Bay Area (think Oakland, Berkeley, Marin County) because Democrats there tend to be more educated and younger — and black — exactly the demographic profile Obama has used to success in earlier states. But wait — if you’re in charge of Obama’s California spending, do you spent, say, $100,000 extra in the 6th Congressional District, which comprises Marin County and Somona County north of San Fransisco? It allocates an even number of delegates — six. Unless there’s a landslide, both Obama and Clinton will get 3, each.
Why not spend that money trying to beat Clinton in the 7th congressional district across the bay — Solano County and parts of Contra Costa counties, where the congressman, George Miller, has already endorsed Obama? CD 7 allocated 5 delegates, an an extra effort there might give Obama one extra delegate.
Of course, the greater seat (delegate) payoff to small vote swings in small and odd-magnitude districts is old hat to us comparative electoral systems analysts…