France's new opposition leader Laurent Wauquiez scrambled Tuesday to hold his Republicans party together, two days after it picked the controversial right-winger to take on centrist President Emmanuel Macron.Wauquiez was elected head of the center-right Republicans on Sunday, running on a hard-right platform that has seen him accused of cozying up to far-right National Front (FN) voters.

Twenty-four hours later, Xavier Bertrand, a party heavyweight from the northern Pas-de-Calais region, quit the Republicans -- the first of a handful of politicians to walk out."I no longer recognise my political family, so I've decided to quit," Bertrand, a moderate who served as the party's secretary-general from 2007 to 2010, said Monday evening, accusing Wauquiez of "aggressiveness".

On Tuesday, the mayor of the northern town of Roubaix, Guillaume Delbar, followed suit, as did two other Bertrand loyalists in the north.

Explaining his decision, Delbar said: "I cannot stay in a party whose leader did not choose clearly between Emmanuel Macron and Marine Le Pen." Delbar was referring to Wauquiez's refusal to endorse Macron over the FN leader in this year's presidential election after the Republicans candidate, Francois Fillon, was knocked out of the race.Mainstream parties of the left and right have traditionally rallied around the FN's opponent in the final round of elections to block the far-right's path to power. But Wauquiez, a 42-year-old devout Catholic who takes a tough line on immigration and security, stopped short of backing Macron, only calling on voters to "not vote for Marine Le Pen".

Celebrating his election as party chief on Sunday, Wauquiez vowed to lead a "renaissance" of the right. He romped to victory over two little-known rivals, winning 75 percent of the votes cast by close to 100,000 party members. But he faces a tough task to rebuild the once powerful party -- it changed its name from UMP to Republicans in 2015 -- which has lost millions of voters and several party heavyweights to Macron.