Who challenged Charles de Gaulle in the 1965 French presidential election?

In the 1965 French presidential election, the moderate leftist François Mitterrand challenged the incumbent Charles de Gaulle.1

Mitterrand stood as the sole candidate representing the socialist and communist left. His campaign was successful in forcing de Gaulle into a runoff election, where de Gaulle ultimately secured victory with 55 percent of the vote compared to Mitterrand's 45 percent.21