People with criminal records can't serve. That eliminates a lot of the usual suspects in DC. Then there are those struck by the attorneys for tactical reasons, which will vary from case to case. I was on a petit jury, not a grand jury; how much latitude does a prosecutor have in picking specific jurors on a grand jury, given that there is no opposing attorney to balance the cherry picking?
DC does vote over 90 percent Democrat but ethnically we're now under 50 percent black with whites a close second, roughly 47 percent to 44 percent. A lot of people probably have a false impression of what a DC jury is likely to look like.
The last time I was selected for jury duty (in New Jersey), I noticed that the jury room looked more like the train station platform waiting for the 6:20 AM commuter train into Penn Station than the demographic makeup of the county.
However, in DC, even excluding those who are prohibited or excused from jury duty, any jury is likely to be overwhelmingly liberal and Democrat. In effect, it will be a rubber stamp for whatever Mueller (and the Deep State) want to do.
As above, I hope that Trump and his lawyers are a lot smarter than I am, because none of the options that I can see look very appealing.
Dangerous thing to comment on this day and age.
While I do know a fine black gentleman who got out of jury duty because he was wearing a Confederate hat, never acknowledge race in the realm of the law if you are white.
Otherwise someone will accuse you of racism.