Sentence:  But if anything can bring home to Mr. Khrushchev the idea that he will not really get much enjoyment from watching this Braddock-against-the-Indians contest , it will probably be the fact that SEATO forces <WSD>are</WSD> ready to attempt it - plus the fact that Moscow has something to lose from closing off disarmament and other bigger negotiations with Washington . 
Meaning of the word marked with <WSD> tags:  have the quality of being; (copula, used with an adjective or a predicate noun)