France's far-right National Front (FN) faced a ferocious campaign Tuesday to stop it taking two of France's most important regions in elections starting this weekend.

As Prime Minister Manuel Valls called the party a "menace to the economy" and business leaders warned of the "ruin" it could cause, two of the main newspapers in the north launched an unprecedented campaign to stop its leader Marine Le Pen taking control of the region.

La Voix du Nord daily and its sister paper Nord Eclair ran a second day of attacks on Le Pen and the party Tuesday, questioning their competence to rule the Nord-Pas-de-Calais-Picardie region.

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