Political leaders throw weight behind same sex marriage

The nation's political leaders have thrown their weight behind the 'yes' vote in the same sex marriage postal survey. Image: Federal Opposition Leader Bill Shorten, centre, poses for a photograph with protestors at a rally in support for marriage equality in Sydney (AAP)

The Prime Minister and Opposition Leader both declare it's an issue that crosses the political divide.

But as this report shows, opponents maintain allowing gay marriage will have wider social consequences.