BOB Katter's Australian Party wants to form a coalition with the Nationals.
But the Nationals have ruled out such a move.
KAP national director Aidan McLindon said the Nationals had been "hijacked by the Liberals".
"If they are true to themselves they will join with the KAP," Mr McLindon said.
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"The Nationals have been reduced to a brand name, at the end of the day the Liberals call the shots and they have not been able to deliver for regional Australia."
Mr McLindon said KAP's principles were a combination of "old Labor and the National-Country party", which were similar roots to the Nationals.
"The Liberal and Labor parties have become two heads of the one creature and the Nationals are irrelevant," he said.
"The Nationals will have to do some soul-searching in the next five to 10 years."
The two major parties had become "parallel and paralysed" and had resorted to "the politics of personalities", Mr McLindon said.
The comments follow a poll conducted last Friday, which showed KAP had better support in Victoria than the Nationals.
According to the 7 News ReachTEL poll, if an election was held this week Labor would receive 36.8 per cent of first-preference votes, followed by the Liberals (34.4 per cent), the Greens (12.4 per cent), Katter's Australian Party (4.4 per cent) and the Nationals (3.5 per cent).
But Nationals Victoria president Peter Schwarz said his party had "clearly demonstrated that we can deliver for Victoria in coalition, through projects such as the $1 billion Regional Growth Fund".
"The Nationals are not considering joining with KAP," he said. "There is no evidence our membership considers that what KAP stands for is what we stand for." The Nationals were "not threatened" by the KAP, Mr Schwarz said.
"I'm not surprised by the poll, the Nationals don't have a history of polling high in polls outside of elections, as those polls often don't take in regional areas."