harry jackman represented the electoral district of rosedale in the house of commons of canada from 1940 to 1949. he was first elected in 1940 as a member of robert manion's world war ii national government caucus (which, despite the name, formed the official opposition in the house of commons of canada), after wresting his party's nomination from conservative incumbent harry gladstone clarke. jackman was re-elected in 1945 as a progressive conservative. he ran again in 1949, but was defeated.