The All Writs Act does not furnish removal jurisdiction; that Act, alone or in combination with the existence of ancillary enforcement jurisdiction, is not a substitute for 28 U. S. C. §1441's requirement that a federal court have original jurisdiction over an action in order for it to be removed from a state court.

The Michigan Supreme Court erred in holding that, under 49 U. S. C. §14504(c)(2)(B)(iv)(III), only a State's "generic" interstate motor carrier registration fee is relevant to determining the fee that was "collected or charged as of November 15, 1991." States may not renounce or modify a reciprocity agreement with another State so as to alter any fee charged or collected as of that date.