With a closer look, however, it appears that big cane refiners - including the maker of household brand Domino Sugar - might be the biggest losers because the deal could choke off imports of raw sugar from Mexico, cutting critical feedstock. The pact setting quotas and prices on Mexican sugar imports for the first time appeared to be the best possible outcome to a months-long dispute that had threatened to escalate into an all-out trade war. Faci…