▁Om n ibus . ▁ ▁He ▁retired ▁from ▁Columbia ▁in ▁ 1 9 8 5 , ▁after ▁which ▁he ▁completed ▁his ▁a ▁doctor ate ▁in ▁political ▁science ▁from ▁Columbia ▁and ▁became ▁a ▁fellow ▁of ▁the ▁Wood row ▁Wilson ▁Center ▁in ▁Washington , ▁D . C . ▁ ▁Security ▁file ▁and ▁legal ▁case ▁In ▁ 1 9 7 7 , ▁after ▁request ing ▁his ▁file ▁under ▁the ▁Fre edom ▁of ▁Information ▁Act , ▁Kim ball ▁discovered ▁that ▁the ▁federal ▁government ▁had ▁regarded ▁him ▁and ▁his ▁wife ▁as ▁a ▁security ▁risk ▁on ▁susp icion ▁of ▁Commun ist ▁sympath ies ▁since ▁the ▁file ▁was ▁opened ▁when ▁he ▁took ▁the ▁Foreign ▁Service ▁exam ination ▁ 3 0 ▁years ▁before , ▁and ▁that ▁the ▁information ▁in ▁his ▁file ▁was ▁based ▁on ▁un subst anti ated ▁anonymous ▁reports . ▁In ▁ 1 9 8 4 , ▁Kim ball ▁file d ▁a ▁$ 1 0   mill ion ▁law suit ▁against ▁the ▁federal ▁government . ▁His ▁name ▁was ▁officially ▁cleared ▁in ▁ 1 9 8 7 ▁after ▁the ▁assistance ▁of ▁Senator ▁Low ell ▁P . ▁We icker ▁of ▁Connecticut ▁and ▁Kim ball ' s ▁agreement ▁to ▁drop ▁the ▁law suit . ▁ ▁Books ▁Kim ball ▁published ▁several ▁books , ▁including ▁The ▁Dis connected ▁( Col umb ia ▁University ▁Press , ▁ 1 9 7 3 ), ▁about ▁institution al ized ▁ex clusion ▁of ▁the ▁minor ity ▁poor ▁from ▁the ▁U . S . ▁elect oral ▁system . ▁The ▁File ▁( H arc ourt ▁Bra ce ▁J ovan ov ich ,