▁years , ▁and ▁it ▁was ▁un com fort able . ▁I ▁think ▁trying ▁to ▁stay ▁at ▁the ▁top ▁is ▁a ▁shortcut ▁to ▁unh app iness ." ▁Hart nett ▁also ▁took ▁a ▁break ▁from ▁acting , ▁saying ▁" I ▁spent ▁a ▁bit ▁of ▁time ▁really ▁thinking ▁about ▁whether ▁this ▁was ▁the ▁right ▁thing ▁for ▁me ." ▁ ▁Activ ism ▁Hart nett ▁has ▁been ▁involved ▁in ▁various ▁causes . ▁In ▁ 2 0 0 7 , ▁he ▁took ▁time ▁out ▁from ▁film ing ▁to ▁support ▁the ▁green ▁l ifest yle ▁campaign ▁of ▁Global ▁C ool . ▁ ▁In ▁ 2 0 1 1 , ▁Hart nett ▁became ▁one ▁of ▁a ▁hand ful ▁of ▁cele brit ies ▁attached ▁to ▁USA ID ▁and ▁Ad ▁Council ' s ▁F WD ▁campaign , ▁an ▁aw aren ess ▁initi ative ▁tied ▁to ▁that ▁year ' s ▁East ▁Africa ▁dr ought . ▁He ▁joined ▁U ma ▁Th ur man , ▁Ch anel ▁I man ▁and ▁Ge ena ▁Davis ▁in ▁TV ▁and ▁Internet ▁ad s ▁to ▁" forward ▁the ▁facts " ▁about ▁the ▁crisis . ▁ ▁In ▁ 2 0 1 2 , ▁Hart nett ▁also ▁joined ▁Bar ack ▁Ob ama ▁in ▁his ▁campaign ▁in ▁Minnesota , ▁appearing ▁at ▁such ▁events ▁as ▁the ▁Minnesota ▁Gre ater ▁T ogether ▁Youth ▁Sum mit ▁before ▁formally ▁end ors ing ▁the ▁President ▁on ▁the ▁official ▁campaign ▁YouTube ▁channel . ▁He ▁along ▁with ▁Min ne apolis ▁Mayor ▁R T ▁Ry b ak ▁also ▁appeared ▁at ▁the ▁University ▁of ▁Minnesota ' s ▁Mc N am ara ▁Al umn