[stillonaroll]

Still, I admit that this district has changed since reapportionment. I still don't understand why a district with a nuclear lab and an air force base would vote Democrat. It must be the people who live near the office parks.

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Looks like part of the district runs through the Berkeley/Richmond axis--solid DemonRat territory. A district map can be found here:

http://www.nationalatlas.gov/printable/congress.html

[Lonely Bull]

Looks like part of the district runs through the Berkeley/Richmond axis--solid DemonRat territory. A district map can be found here:

http://www.nationalatlas.gov/printable/congress.html

[I took the liberty of making the link clickable.]

Most of it doesn't run through that axis--Berkeley's still Barbara Lee, Richmond's still George Miller.

But the 10th district does grab the city of El Cerrito (where I lived long ago, before redistricting made the map what it is now) and the unincorporated town of Kensington. They make up the westernmost green pocket (and have a total population of maybe 30,000 at most).

It's not joined by road to the rest of the district. (The area immediately east of El Cerrito is hilly parkland, and the only roads through the park area begin a little to the south.)

There's some electoral reasoning for having this little pocket of the district there, but I wouldn't know it.