I cant tell u on the site i posted the answer on answers.com
Personally, i believe it shouldn't, unless the number of votes required is more than half of the total population.
If, a legislation could be chosen by voters ballot, there is simply no need for the legislative branch to exist, because their decision could be easily overrun by the ballots.
The second problem is, voters ballot will be chosen purely by voter's selfish personal desire without having to pay attention what the whole nation needed
Americans began to wonder if they could win the war. During the beginning of the war, morale amongst Americans was generally high and accepted a quick victory against the Viet Cong. As time went on however, fighting in the unknown terrain of Vietnam against an enemy who had no true uniform and blended in with the locals made fighting very difficult which prolonged the war. In 1968, the Viet Cong launched a nationwide surprise attack in cities, in the countryside, by splinter groups who all coordinated assaults in South Vietnam known as the Tet Offensive. The attack was a failure for the Viet Cong, but for the Americans to see the size and scope of the surprise attack in areas originally thought to be under US and South Vietnamese control was a psychological blow for the American military. They soon realized that fighting an enemy who they could not identify regardless of the hostile or friendly terrain eventually influenced the Americans decision to pull out of the war in 1973.
I would say the answer is three (not 100% sure tho). It's definitely not 2 or 1
