What is a runoff election and when is it required?

A runoff election is a second election. It is held if the top vote-getting candidate in a first election - a primary or a general election - did not achieve the minimum percentage of votes required in that state.

the article must be ratified by three-fourths (38) of states within a proscribed deadline.

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well it depends i think people around the world are coming around to gay marriage. but if you are talking abortion then wow, so much to talk about. such as men thinking they have the right to choose if women can, the fact there are health concerns if the women can't get one, and many more arguments to discuss. so i would definitely say abortion would be a much more interesting topic.