Coalition MP Warren Entsch has predicted the three country independents will back a federal Labor government.
Mr Entsch believes MPs Bob Katter, Rob Oakeshott and Tony Windsor, all former National Party members, will announce their support for Labor in the coming days.
With Labor and the coalition both falling short of the 76 seats needed for a majority in the federal House of Representatives, the three MPs will decide who forms government.
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"I think they have painted themselves into a corner and their electors will judge them accordingly," Mr Entsch told AAP.
He accused Prime Minister Julia Gillard of making unrealistic promises to secure the support of the MPs.
"It seems to me that Julia Gillard will promise anything to get power," he said.
"She'll promise them the bloody world, and then when she's in government they'll go feral, and she'll blame them and have that as a reason to go back (to the polls)."
Mr Entsch backed the way Opposition Leader Tony Abbott handled negotiations with the trio.
"The way Tony is going, I agree with him completely. You only agree to what is achievable," he said.
"There were certain things you can go along with, but when you start talking about some of the things (Bob Katter) is talking about, particularly in relation to trade tariffs, there is no point in even offering them because they are not achievable."
