GOP presidential contenders flock to Iowa to tout and derail ethanol

In Iowa, GOP presidential contenders have begun canvassing the state where not surprisingly ethanol is becoming a hot button issue. Jeb Bush said he supported the RFS but believes the policy should be phased out over the coming years. Scott Walker, on the other hand, flip-flopped his notorious anti-RFS stance and said instead that he supports the continuation of the policy. Ted Cruz instead likened the RFS to corporate welfare.