This Guardian editorial concludes that the terrorist outrage in Paris three weeks ago coincided with the resurgence of an anti-immigration, anti-Muslim populism in France.
Source: The Guardian view on the French regional elections: the remarkable resilience of the far right | Editorial | Comment is free | The Guardian
Of course, this is just the first weekend of voting, with large abstention but the Socialists are currently trailing third.
Whether you love or loathe them, the FN (Front National) are a rising political force France. Another interpretation is that deeply unhappy with current policies on immigration/refugees and more broadly the loss of France’s national sovereignty.
These days the FN has tried to clean up its imagine but for me the hard-right remains the hard-right and Europe is deeply scarred by its history.