Doing the minimum possible on legal migration would have the unwelcome effect for the Prime Minister of prolonging and intensifying debate about it.
It is harder for liberal critics to impute racism, or undue severity, to a Home Secretary who herself belongs to an ethnic minority.
That was the norm of the past ten years, in the form of Farage’s parties. There’s no reason to assume that a new challenger won’t emerge.
The second piece in our mini-series on the road to Brexit explores the challenges which the anti-EU movement overcame to survive and then thrive.