Abortion is one of the top issues for US voters in November's elections. SBS looks at how and why this is so.

Abortion is one of the leading issues in the US, sure to animate any discussion of politics and life. For decades now, it has been a key issue for voters and one where partisan lines are predictably drawn between Democrat and Republican parties and candidates. But how has that happened? Where does abortion policy currently sit - and what impact might all of this have on this November's elections, when both candidates have made it a centrepiece of their campaigns - albeit for vastly different reasons.