Crossbench libertarian senator David Leyonhjelm is threatening to block legislation unless the Turnbull government allows the entire parliament a vote of conscience on its euthanasia bill.
The bill would allow the territories, the Northern Territory and the ACT, to legislate their own euthanasia policies.
ACT chief minister Andrew Barr and NT prime minister Michael Gunner pulled out a full-page ad on Monday and urged the Senate to pass the bill on Tuesday.
"Voting for this bill does not mean there will be assisted death in the NT or the ACT," the announcement says.
"It will simply give the Territories the same right to decide about him as other Australians."
The Senate has already voted to prioritize the Leyonhjelm project over any other legislation, so the tax cuts to the government's signature are suspended for the time being.
But Senator Leyonjjelm said Prime Minister Malcolm Turnbull also promised him a vote of conscience in the lower house, and threatened to block other bills unless the vote was carried out.
Last week, Turnbull said a vote by the House of Representatives was an "issue that the government would consider."
Senator Leyonhjelm said that the staff witnessed the treatment that, according to him, Mr. Turnbull accepted in exchange for his support for the reinstatement of the Australian Construction and Construction Commission.
"He has a problem with his own party, there are conservatives within his party who basically hate the prime minister more than they hate the opposition for reasons they themselves know better," Sen. Leyonhjelm told ABC TV on Sunday. the night.
"They're looking for all the opportunities to make him have a hard time, he's very sensitive to that, they're social conservatives, so he did not want to give them any ammunition."
Senator Leyonhjelm said he would not support the next legislation, including industrial relations and a tax on NBN clients, which will be presented in the Senate until the agreement is maintained.
"I do not feel vindictive about this, I'm upset that what was an agreement seems to be no more a deal in the eyes of the government," he said.
"Until they are ready to accept that is the deal and stick to the deal … there are 50 or 60 bills waiting in line to be taken care of, for me, going any way is quite easy."
The coalition needs eight of the 10 independent senators from One Nation and Center Alliance to pass their legislation.
The upper house is expected to debate Senator Leyonhjelm's legislation on Tuesday.