Sentence:  We have concluded that petitioner 's claims are controlled by the <WSD>rationale</WSD> of gonzales v. United States , 348 U. S. 407 ( 1955 ) , and United States v. Nugent , 346 U. S .1 ( 1953 ) , and therefore affirm the judgment . 
Meaning of the word marked with <WSD> tags:  (law) an explanation of the fundamental reasons (especially an explanation of the working of some device in terms of laws of nature)