The best course of action at present is to leave Wilder in situ and monitor the situation.
It's unlikely that another manager could now save the club from relegation, so dismissing him for reasons of PL survival is futile.
The question is whether Wilder is now the right man to lead the club in a promotion push next season.
That depends on what happens between now and the end of the season.
If the club is narrowly defeated in games, and morale in the camp is not irreparably damaged, then there is no reason why he cannot remain the manager in the Championship.
If, however, United start to be heavily beaten in games then the situation will have to be reviewed for the benefit of all.
It's unlikely that another manager could now save the club from relegation, so dismissing him for reasons of PL survival is futile.
The question is whether Wilder is now the right man to lead the club in a promotion push next season.
That depends on what happens between now and the end of the season.
If the club is narrowly defeated in games, and morale in the camp is not irreparably damaged, then there is no reason why he cannot remain the manager in the Championship.
If, however, United start to be heavily beaten in games then the situation will have to be reviewed for the benefit of all.