. ▁citizens ▁in ▁different ▁states , ▁and ▁cases ▁between ▁U . S . ▁citizens ▁and ▁foreign ▁states ▁and ▁their ▁citizens , ▁come ▁under ▁federal ▁juris diction . ▁The ▁tri als ▁will ▁be ▁in ▁the ▁state ▁where ▁the ▁crime ▁was ▁committed . ▁ ▁No ▁part ▁of ▁the ▁Constitution ▁express ly ▁author izes ▁jud icial ▁review , ▁but ▁the ▁F ram ers ▁did ▁cont em plate ▁the ▁idea . ▁The ▁Constitution ▁is ▁the ▁supre me ▁law ▁of ▁the ▁land . ▁Pre ced ent ▁has ▁since ▁established ▁that ▁the ▁courts ▁could ▁exercise ▁jud icial ▁review ▁over ▁the ▁actions ▁of ▁Congress ▁or ▁the ▁executive ▁branch . ▁Two ▁conflic ting ▁federal ▁laws ▁are ▁under ▁" p endent " ▁juris diction ▁if ▁one ▁presents ▁a ▁strict ▁constitution al ▁issue . ▁Federal ▁court ▁juris diction ▁is ▁rare ▁when ▁a ▁state ▁legisl ature ▁en act s ▁something ▁as ▁under ▁federal ▁juris diction . ▁To ▁establish ▁a ▁federal ▁system ▁of ▁national ▁law , ▁considerable ▁effort ▁goes ▁into ▁developing ▁a ▁spirit ▁of ▁com ity ▁between ▁federal ▁government ▁and ▁states . ▁By ▁the ▁doctrine ▁of ▁' Res ▁jud ic ata ', ▁federal ▁courts ▁give ▁" full ▁faith ▁and ▁credit " ▁to ▁State ▁Cour ts . ▁The ▁Supreme ▁Court ▁will ▁decide ▁Constitution al ▁issues ▁of ▁state ▁law ▁only ▁on ▁a ▁case - by - case ▁basis , ▁and ▁only ▁by ▁strict ▁Constitution al ▁necessity , ▁independent ▁of ▁state ▁legisl ators ' ▁mot ives , ▁their ▁policy ▁out comes ▁or ▁its ▁national ▁wisdom . ▁ ▁Section ▁ 3 ▁bars ▁Congress ▁from ▁changing ▁or ▁modifying ▁Federal ▁law