▁began , ▁drawing ▁criticism ▁from ▁the ▁public ▁and ▁even ▁other ▁suff rage ▁groups ▁for ▁being ▁un pat ri otic . ▁On ▁October   1 7 , ▁Alice ▁Paul ▁was ▁sent enced ▁to ▁seven ▁months ▁and ▁on ▁October   3 0 ▁began ▁a ▁hung er ▁strike , ▁but ▁after ▁a ▁few ▁days ▁prison ▁authorities ▁began ▁to ▁force ▁feed ▁her . ▁After ▁years ▁of ▁opposition , ▁Wilson ▁changed ▁his ▁position ▁in ▁ 1 9 1 8 ▁to ▁advoc ate ▁women ' s ▁suff rage ▁as ▁a ▁war ▁measure . ▁ ▁The ▁key ▁vote ▁came ▁on ▁June   4 ,   1 9 1 9 , ▁when ▁the ▁Senate ▁approved ▁the ▁am end ment ▁by ▁ 5 6 ▁to ▁ 2 5 ▁after ▁four ▁hours ▁of ▁debate , ▁during ▁which ▁Democratic ▁Sen ators ▁opposed ▁to ▁the ▁am end ment ▁fil ib uster ed ▁to ▁prevent ▁a ▁roll ▁call ▁until ▁their ▁absent ▁Sen ators ▁could ▁be ▁protected ▁by ▁pairs . ▁The ▁A yes ▁included ▁ 3 6 ▁( 8 2 %) ▁Republic ans ▁and ▁ 2 0 ▁( 5 4 %) ▁Democr ats . ▁The ▁N ays ▁compr ised ▁ 8 ▁( 1 8 %) ▁Republic ans ▁and ▁ 1 7 ▁( 4 6 %) ▁Democr ats . ▁The ▁Nin ete enth   Am end ment , ▁which ▁prohib ited ▁state ▁or ▁federal ▁sex - based ▁restrictions ▁on ▁voting , ▁was ▁rat ified ▁by ▁sufficient ▁states ▁in ▁ 1 9 2 0 . ▁According ▁to ▁the ▁article , ▁" N in ete enth ▁Am end ment ",