Whakaotihia te rerenga e whai ake nei: I tohua a Hart hei tohu mo Canada i te 2017 World Junior Ice Hockey Championships. I kawea mai hei kaitiaki kaitiaki, i tukuna ia i muri i te whakaaetanga i nga whainga e toru i roto i nga pupuhi 17 na Russia ka karangahia ano ka tukuna e Connor Ingram nga whainga e rua i roto i nga pupuhi e toru na Sweden. Whai muri i te 31 o nga whakaoranga i te kemu mētara koura ki te United States, i tukuna e Hart tetahi whaainga a Troy Terry ki te hoatu ki a Canada te mētara hiriwa. I whiriwhiria anō ia, me Michael DiPietro i tēnei wā, mō te
Ko te 2018 World Junior Ice Hockey Championships. Whai muri i tana rekoata i te 23-whakaora i te Czech Republic i mua i te whakataetae, i whakaingoatia a Hart hei tiimata mo Canada. I hinga a Canada i a Sweden i te whakataetae mētara koura, a ka mutu a Hart i te whakataetae me te rekoata 5<unk>0<unk>1, e hono ana i te rekoata umanga rangatahi o te ao o Canada i te 8<unk>0<unk>2.