USSC Senior Non-Resident Fellow Bruce Wolpe spoke to SBS News about the non-mandatory nature of the US voting system and how it self-selects for "more extreme political candidates."

“In Australia, everyone votes. But, together with preferential voting, it means that the country always lands centre-left or centre-right. So a blow in like Trump cannot come to Australia and become prime minister and Clive Palmer will never be prime minister, Pauline Hanson will never be prime minister," said Wolpe.