"...seek to determine the administration's definition of 'sanctuary cities'..." Now this is how to make an argument. One reason why MLK was successful in his contact with American government is that he used the government's argument of equality against itself. Govt said everyone is equal. MLK said, You (govt) said we are equal...you said it, not me...you. That is an abstract, but it is how he setup his argument. The same for Natives. The government said it would take care of them...the government said it. The retort against black equality was, "Wait, we will change to an equal state." No where in the Constitution is there a time clause, therefore, waiting was unacceptable, but only because waiting was unconstitutional, and again setting up to use the government arguments against itself. Granted it was/is being run by racists, so their arguments are poor to begin with.