IMHO there's a difference between uniting technically separate but similar areas on the west side of the city of Chicago (plus a couple inner burbs), which looks ugly but is not as ugly as it looks, and uniting downtown (and south) Dallas with downtown Forth Worth - let alone doing so twice.
Which, of course, is why I drew my districts in Dallas and its immediate suburbs alone. Though I did cross the county line.
But yeah, to get the Black district over 50% you need to draw it first and put all the Black-and-Hispanic areas in it. Drawing a Hispanic district from what's left after that requires heading to Fort Worth, I think.
I suspect that the two neighborhoods linked in Chicago are just as politically and culturally distinct as the two linked in my Metroplex map.
The two neighborhoods aren't even the same nationality, right? IIRC one is mostly Mexican while the other is predominantly Puertorican.
I guess that's how it used to be, but now Mexicans are predominant in both areas. Muon might know better though.