Jean-Louis Borloo has made a career of tackling lost causes. As a Parisian lawyer he rescued failing businesses. In 1988 he revived a bankrupt soccer team. And as mayor of Valenciennes from 1989 to 2002, he resurrected the moribund former steel town by revamping neighborhoods, attracting a Toyota factory, building a theater, and planning a regional tram whose first rail will be laid this week. Can this miracle worker save France's embattled conservative government after the party's rout in last month's regional elections?
It was evidently with that hope in mind that President Jacques Chirac plucked Jean-Louis Borloo,...