Bay of Plenty MP Todd Muller won the support of the National Party caucus today, ending Simon's two-year reign as leader.
Nikki Kaye also replaced Palua Bennett as deputy leader.
Simon went into the emergency caucus meeting saying he was confident of retaining his job. However, two abysmal polls this week appeared to have sealed his fate.
They showed that not only did voters overwelmingly favour Prime Minister Jacinda Ardern as leader, but support for National had also dipped to as low as 29 percent - its worst showing in 17 years.
In his first public comment after the result was announced, Simon thanked New Zealanders on Twitter:
More time for the most important job I have. Thank you New Zealand. pic.twitter.com/q47X9r3bK8— Simon Bridges (@simonjbridges) May 22, 2020