Change of venue - at least in Canada - is normally done to move a case from a small town, where the crime is notorious, to a large city. The theory is that in the small town, everybody has a preconceived opinion on the case whereas no one gives a fuck in the big city. The classic case was moving the Demeter trial from Mississauga (then only a couple of hundred thou people) to London, ON. (London was also pretty small, but was a long way away from Mississauga geographically).Does he mean whiter? DC is fairly diverse, but has a lot of African-Americans...
Trump should be able to get a diverse and unopinionated jury in DC ffs! If that's an issue, he can move it to the Virginia burbs or Baltimore. WV is likely to be very non-diverse and is picked as a Trump stronghold where the bulk of the population are poorly educated whites.