In 2008 and 2012 Obama won the majority of votes in the cities/counties of: Dallas/Dallas, Austin/Travis, Houston/Harris, San Antonio, El Paso, etc.
Below are the Texas votes per county...
2008: https://en.wikipedia.org/wiki/United_States_presidential_election_in_Texas,_2008#By_county
2012: https://en.wikipedia.org/wiki/United_States_presidential_election_in_Texas,_2012#By_county
p.s. Here in Houston we have elected an openly gay female mayor the past two terms
Annise Parker
https://en.wikipedia.org/wiki/Annise_Parker
That's more than some other big cities have done