▁State ▁Senate ▁from ▁Hay nes ville ▁in ▁Cla ib or ne ▁Par ish , ▁challeng ed ▁Sand lin ▁for ▁re - nom ination ▁but ▁soon ▁with d rew ▁because ▁of ▁ill ▁health . ▁Sand lin ▁then ▁won ▁by ▁a ▁seven - to - one ▁margin ▁over ▁his ▁remaining ▁oppon ent , ▁Dr . ▁J . ▁H . ▁C annon ▁of ▁Sh re ve port . ▁H oll ens head ▁subsequently ▁left ▁the ▁Senate ▁two ▁years ▁later ▁after ▁only ▁one ▁term ▁in ▁office . ▁ ▁Sand lin ▁was ▁a ▁member ▁of ▁the ▁commission ▁which ▁author ized ▁the ▁Jefferson ▁National ▁Exp ansion ▁Memorial ▁in ▁St . ▁Louis , ▁Missouri , ▁in ▁recognition ▁of ▁the ▁Louisiana ▁P urchase ▁of ▁ 1 8 0 3 . ▁ ▁Ro ose vel t ▁there after ▁ur ged ▁Sand lin ▁to ▁challenge ▁the ▁re e lection ▁of ▁U . S . ▁Senator ▁H ue y ▁Long . ▁However , ▁before ▁the ▁scheduled ▁election ▁in ▁ 1 9 3 6 ▁could ▁occur , ▁Long ▁was ▁assass in ated ▁in ▁ 1 9 3 5 . ▁Pro - Long ▁supp or ters , ▁who ▁co ales ced ▁behind ▁Allen ▁Ell ender , ▁started ▁a ▁false ▁alleg ation ▁that ▁Sand lin ▁had ▁been ▁involved ▁in ▁the ▁assass ination ▁of ▁Long . ▁ ▁During ▁part ▁of ▁Sand lin ' s ▁con gression al ▁ten ure , ▁his ▁chief ▁a ide ▁was ▁J . ▁Frank ▁Col bert , ▁a ▁former ▁member ▁of ▁the ▁Louisiana ▁House ▁of ▁Representatives ▁and ▁the ▁mayor ▁of ▁M inden ▁from ▁