[Jim W N]

There you go again, defending unconstitutional totalitarian government power against your own interest.

Except for cases where a public official or a state is a party, Federal courts are appellate courts (Art. III, Sec, 2, Cl, 2). Federal police are not constitutionally authorized or required.

[Alberta's Child]

Are you and I even reading the same Constitution? You posted a reference to a specific clause assigning jurisdiction to the "Supreme Court," while ignoring the prior clause that applies to Federal courts in general:

The judicial Power shall extend to all Cases, in Law and Equity, arising under this Constitution, the Laws of the United States, and Treaties made, or which shall be made, under their Authority;—to all Cases affecting Ambassadors, other public Ministers and Consuls;—to all Cases of admiralty and maritime Jurisdiction;—to Controversies to which the United States shall be a Party;—to Controversies between two or more States;—between a State and Citizens of another State;—between Citizens of different States;—between Citizens of the same State claiming Lands under Grants of different States, and between a State, or the Citizens thereof, and foreign States, Citizens or Subjects.

Note the bold item above. How is the United States NOT a party when a Federal building is attacked?