Which political part in the usa would be more wiling to lower the drinking age to 18 ?

It was 18 until 1986 in both Texas and Louisiana until they passed the Federal law in 1986. You have MADD (Mothers Against Drunk Driving) to thank for that. Not sure how much it helped, if any. I know it really hurt the bar business. The reason it would be bad to lower it is statistical...statistically, a LOT more 18 to 21 year old got into fatal drunk driving accidents than any other age group.