Urban GOP enclaves

[bedstuy]

I'm already aware of South Brooklyn

Do you mean Southern Brooklyn?  South Brooklyn is about 90%+ Democrat fairly consistently.  Southern Brooklyn has some GOP enclaves however.   

In NYC, GOP areas tends to be populated by fundamentalist Jews or middle class Italians. 

[bedstuy]

Most of the cities Miles mentioned (as well as many high populated GOP areas) aren't really urban. There's also the Cuban areas in/near Miami. IIRC, a McCain CD can be drawn within Philly, not sure where else this can be done with being entirely in a urban area.

McCain CD in Philadelphia? Either you have a very broad view of Philadelphia, or a very small CD (as in, I don't know, 100,000 people, may be 150,000). Philadelphia without suburbs is well over 80% Dem - which exactly are the areas you'd include?

I was mistaken. I must have been thinking of a state House district that a member had drawn. It makes sense now that an entirely Philly McCain CD would be impossible. I'm pretty sure however that a McCain CD can be drawn in (or mainly in) Houston, Dallas, and/or San Antonio, any ideas where else?

Phoenix (the northern part of Phoenix). 

[bedstuy]

It seems kind of unfair to compare city whose borders capture a large part of the metro area to a city with a ton of small independent suburbs.  Some cities basically have Republicans suburbs within their city limits. 

I think it would be more interesting to see the most GOP areas with a certain population density.