News that New Zealand First put the brakes on the Government's plans to start work on Auckland's Light Rail is just the latest in a string of planned policies kiboshed by Winston Peters' party.
From a Capital Gains tax to rent relief for landlords, failure to get New Zealand First onside at Cabinet has resulted in some significant policies being blocked, modified or killed altogether.
Although she admits it is frustrating at times, Prime Minister Jacinda said this is just a reality of modern-day New Zealand governments.
Political commentator Neale Jones says NZ First is polling around 3 percent, so it's life or death for them.
"They can't go into the election saying they are just like Labour, the people NZ First have to win are generally more conservative. "
Political commentator Ben Thomas says the handbrake appeal is the last option for NZ First.
"Winston Peters is taking an aggressive stance this time ahead of the election."