I guessing that his district is majority black, so what he does will make no difference. As long as he stays black and democrat the blacks will vote for him.
The ONLY thing they care about is the race of the voter; however, when both candidates are equal on this aspect, THEN Mencken's analysis comes into play
“The state — or, to make matters more concrete, the government — consists of a gang of men exactly like you and me. They have, taking one with another, no special talent for the business of government; they have only a talent for getting and holding office. Their principal device to that end is to search out groups who pant and pine for something they can’t get, and to promise to give it to them. Nine times out of ten that promise is worth nothing. The tenth time it is made good by looting ‘A’ to satisfy ‘B’. In other words, government is a broker in pillage, and every election is a sort of advanced auction on stolen goods.”