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Deputy Prime Minister Barnaby Joyce says banning the burka could damage Australia's trade relations with Islamic countries, including Saudi Arabia and Indonesia.
His comments cast doubt on Nationals MP George Christensen's bid to ban the Islamic garb in Parliament buildings and in Government offices or departments.
Mr Christensen wants the matter to be debated at the party's national conference in Canberra on Sunday, but has to convince his colleagues to vote against his party leader, Mr Joyce.
"I love the democracy of my party," Mr Joyce said.