The Government appears to be struggling to get support for the Trans-Pacific Partnership, even within its own ranks.

A 3 News Reid Research poll shows 54 percent of voters disagree with the controversial 12-nation free trade agreement.

34-percent of voters are on board, while 12 percent are undecided.

Even some National voters have doubts about the agreement -- 23 percent don't want New Zealand to sign up.

The TPP needs to pass through Parliament before the Government puts pen to paper.

That final signing is expected to take place in New Zealand at some point next year.