It's really amazing that in a state of that size, the Democratic bench is pretty weak.
The Democrats fail here because their current strategy is to do nothing and when Texas turns Hispanic in a few years expect 60+% of the hispanic vote. Meanwhile the TX GOP is actually working to win over hispanics and actually working to keep hard R counties as they are. This is not an endorsement of the TX GOP (though I am technically a card carrying member), but just the way it is. The TX Dems are losing and will continue to lose TX until either the TX GOP find a way to lose (such as keeping Perry on for another 4 years) or the TX Dems actually start working for votes.