8 5 4 ▁treat y ▁took ▁effect , ▁but ▁the ▁treat y ▁still ▁resulted ▁in ▁mod est ▁direct ▁g ains . ▁The ▁structure ▁of ▁the ▁economy ▁changed ▁because ▁mark ets ▁for ▁some ▁comm od ities , ▁such ▁as ▁coal , ▁increased ▁greatly ; ▁the ▁demand ▁for ▁other ▁goods ▁was ▁un changed . ▁The ▁Re ci pro city ▁Tre aty ▁complement ed ▁the ▁earlier ▁movement ▁toward ▁free ▁trade ▁and ▁stim ulated ▁the ▁export ▁of ▁comm od ities ▁that ▁were ▁sold ▁primarily ▁to ▁the ▁United ▁States . ▁ ▁End ▁The ▁treat y ▁was ▁ab rog ated ▁by ▁the ▁Americans ▁in ▁ 1 8 6 6 ▁for ▁several ▁reasons . ▁Many ▁felt ▁that ▁Canada ▁was ▁the ▁only ▁nation ▁benef iting ▁from ▁it ▁and ▁object ed ▁to ▁the ▁protect ive ▁C ay ley – G alt ▁Tar iff ▁im posed ▁by ▁the ▁Province ▁of ▁Canada ▁on ▁manufact ured ▁goods . ▁Also , ▁the ▁United ▁States ▁was ▁angry ▁at ▁the ▁British ▁for ▁having ▁uno fficial ly ▁supported ▁the ▁Confeder ates ▁during ▁the ▁Civil ▁War . ▁ ▁The ▁state ▁of ▁Maine , ▁given ▁its ▁location , ▁was ▁a ▁key ▁player . ▁The ▁treat y ▁benef ited ▁Port land ' s ▁trad ing ▁position ▁with ▁respect ▁to ▁Montreal ▁and ▁the ▁Canadian ▁hinter land , ▁but ▁many ▁Maine ▁polit icians ▁and ▁business men ▁worked ▁successfully ▁to ▁terminate ▁the ▁treat y . ▁Many ▁vot ers ▁were ▁angry ▁with ▁Canad ians ' ▁actions ▁during ▁the ▁Civil ▁War . ▁There ▁was ▁comp lac ency ▁on ▁the ▁part ▁of ▁Port land ▁rail road ▁interests ,