You two above me way underestimate Texas.
Remember that one guy back in November... I know he didn't win in Texas but...
As a native Texan, I have complete faith that Texas could elect an African-American. It would just entertaining, in a very sad, sad way, to see what sort of alliances and support developed in a Hispanic Democrat vs. Black Republican race.
You're right
I Imagine it would be Hispanics and Liberals (Austin) Vs. Suburbanites, Blacks, and a large percentage of normal Republican voters.
It could get nasty, but I still think Republican Williams would win easily, perhaps even more than normal.
And... if you don't think Williams would win the black vote, go ahead and look up he and Wallace Jefferson's election results in Democrat areas (both are black Republicans)