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Gay free vote threatens coalition deal: MP

AAP logoAAP 12/10/2016 Rashida Yosufzai

A parliamentary free vote on gay marriage could break the coalition deal between the Liberals and the Nationals, a government MP says.

George Christensen issued the warning in the event of the government proceeding with the alternative to the doomed plebiscite.

"When you're breaking one of the fundamentals of the coalition deal you've obviously decided to break the coalition deal," the Nationals MP told Sky News on Wednesday.

"There would be some serious repercussions."

But the outspoken government backbencher said a free vote won't happen and neither would a coalition break up.

"That would be quite the serious matter so I don't think that's going to eventuate."

The Turnbull government is under pressure to explain whether it has a Plan B to to plebiscite, which appears doomed after the opposition formally rejected enabling legislation.

The coalition hasn't won enough crossbench support in the Senate to get it through the parliament.

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