Opinion survey finds Front National party will win Nord-Pas-de-Calais in north-east France from the socialists in year-end regional elections.
New attack on flagship socialist policy by former investment banker Emmanuel Macron leads to new row on eve of party conference.
Though ruling socialists lost heavily in Sunday's polls, Hollande says priorities are supporting investment and 'social justice by promoting work'.
The far-right FN wins its first mayoral seat since 1995 and appears well placed to gain other towns as ruling socialists hit by record low turnout.
List of ministers' assets could set off a storm on Monday, revealing handful of millionaires in Socialist government as nation endures spending cuts.
With the UMP paralysed by a bitter leadership dispute, the ruling Socialists have pushed ahead with contentious legislation almost unchallenged.