See, gerrymandering at the federal level is illegal only if you're doing it solely to create a majority-minority district. In the Dist. Unfortunately for the Democrats' plan, Republican Granger, former mayor of Fort Worth, took Dist. 12, once Pete Geren's district. But the mapmakers get to add two seats this time, and that's where the action is.
Chances are they'll look pretty loopy.
There's more than a half's worth around Dallas, between Dists. So look for a lot of redrawing of boundaries all along I-45 to accommodate a new seat between Dallas and Houston. That's a little misleading, since Hinojosa is from, and mostly represents people in, Hidalgo County, but the northern parts of his range are fair game. A new district would have to avoid Bexar County, since Bonilla, Smith, Dist. 20's Charlie Gonzalez, and Dist.