Valls hopes to unite Socialists and give the left a chance to stay at the Elysee Palace despite current opinion polls suggesting the second round of the election could pit Marine Le Pen, the leader of the far-right National Front, against conservative Francois Fillon.
The 53-year-old Cazeneuve is a close ally of Hollande and became a popular figure in French politics as the champion of measures tackling extremism in his interior minister role.
Cazeneuve was appointed interior minister in 2014 and had to supervise the response to a series of attacks that have claimed more than 200 lives since January 2015. In total, he championed three counterterrorism laws and one intelligence law. He has also been in charge of implementing France’s state of emergency following the Paris attacks that killed 130 people.
After a brief meeting with Valls at the Elysee, Hollande posted a brief message on Twitter announcing Cazeneuve’s appointment, which was also confirmed by the presidential palace press office.
A leading yet divisive figure of the Socialist party, Valls is known for his outspoken, authoritarian style and his tough views on immigration and security. He will face other contenders in the Socialist primary next month before France’s two-part presidential election in April and May.
Valls has been harshly criticized by members of his own party after championing tough labor reforms and endorsing a controversial ban last summer on the Islamic “burkini” swimsuit.
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