Why a mega trade deal has been thrown in jeopardy

Key points

• The EU-Australia Free Trade Agreement faces an uncertain future in parliament after the National Party leader Matt Canavan vowed to block it. Liberal treasury spokesman Tim Wilson said the coalition is tentatively opposed but has not seen the final legislation.
• Trade Minister Don Farrell warned that abandoning the deal would harm the economy. Without coalition support, Labor would need Greens backing to pass it through the Senate.
• If it fails, it would be the first free trade agreement Australia has failed to ratify.