Simple:
* The politician made a complete volte-face on his stance on immigration.
* After years of opposing the project, the company did a volte-face and decided to support it.
Adding context:
* After facing intense public pressure, the government did a dramatic volte-face and announced new measures to combat climate change.
* The CEO's volte-face on the merger shocked everyone, as he had previously been a strong advocate for it.
Figurative:
* The company's marketing strategy took a complete volte-face, shifting from traditional advertising to online campaigns.
* His personal life did a complete volte-face after he met the love of his life.
Remember: "Volte-face" implies a complete and sudden change of opinion or direction, often a reversal of a previously held position.