The death of Pope Francis has set in train one of the most unique contests in world politics: the Papal conclave. Cardinals will vote again and again until one name achieves a two-thirds majority and becomes pope.

Voting is not the conclave's only similarity to secular politics. The prospects of victory for frontrunners Antonio Tagle from the Philippines and current Vatican secretary of state Pietro Parolin have declined in recent days, thanks to the emergence of negative stories about the two cardinals.

But how do the 133 cardinals, many of whom do not know each other, align behind a particular candidate?

Venezuelan journalist Edgar Beltrán is Rome Correspondent for The Pillar, a US-based Catholic news organisation. He joins Hugh to explain the behind-the-scenes politics, friendships and rivalries that play a big role in the selection of the next pope, why it is possible this conclave of cardinals may struggle to reach a conclusion and what happens if the votes remain tied.

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