Sentence:  For we must number here not only the names of Bushnell , Clarke , and Rauschenbusch , not to mention those of `` the Chicago School '' and Macintosh , but those of the brothers Niebuhr and ( if America may <WSD>claim</WSD> him ! ) 
Meaning of the word marked with <WSD> tags:  demand as being one's due or property; assert one's right or title to