[GrandJediMasterYoda]

“The United States will take all appropriate action, including litigation if necessary, to prevent the State of Kansas from interfering with the activities of federal officials enforcing the law.”

Translation: "...prevent the State of Kansas from interfering with federal officials attempting to violate the Constitution.”

[0.E.O]

Translation: "...prevent the State of Kansas from interfering with federal officials attempting to violate the Constitution.”

Then Kansas should arrest them and take the matter through the courts.