The Latest: French hopefuls show no common ground pre-debate

French far-right presidential candidate Marine Le Pen waits before delivering a speech at a conference on Africa-France relationships, in Paris, Tuesday, May 2, 2017. Le Pen lifted verbatim parts of a speech by a former rival in what her critics called plagiarism and she said was a deliberate "wink" to him to woo his conservative voters in France's presidential runoff Sunday. (AP Photo/Thibault Camus) (The Associated Press)

French presidential election candidate for the far-right Front National party, Marine Le Pen, left, and French presidential election candidate for the En Marche ! movement, Emmanuel Macron, pose prior to the start of a live broadcast face-to-face televised debate in La Plaine-Saint-Denis, north of Paris, France, Wednesday, May 3, 2017 as part of the second round election campaign. Pro-European progressive Emmanuel Macron and far-right Marine Le Pen are facing off in their only direct debate before Sunday's presidential runoff election. (Eric Feferberg/Pool Photo via AP) (The Associated Press)

French people watch a live broadcast television debate with French centrist presidential candidate Emmanuel Macron and far-right candidate Marine Le Pen, Wednesday, May 3, 2017 in a bar of Biarritz, southwestern France. French presidential candidates debate four days before the vote for the second round. (AP Photo/Bob Edme) (The Associated Press)

The Latest on France's presidential election (all times local):

8:30 p.m.

Far-right presidential candidate Marine Le Pen and untested centrist Emmanuel Macron have arrived at a television studio outside Paris ahead of a high-stakes debate and shown there is unlikely to be any common ground in their verbal showdown.

Their one-on-one debate on Wednesday is scheduled to be the only direct confrontation between the candidates ahead of Sunday's runoff election for the presidency.

Between the anti-EU Le Pen and pro-European Macron, the two offer polar-opposite platforms.

Le Pen said upon her arrival at the studio that she hopes the debate will help the millions of undecided French make up their minds between "continuity or change that I represent."

Macron says he wants to show that Le Pen's platform "cannot respond to the challenges of the country."

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11:55 a.m.

Emmanuel Macron and Marine Le Pen are preparing for their one-on-one televised French presidential election debate, with much at stake for both contenders.

They are expected to square off for more than two hours Wednesday in their final showdown before Sunday's runoff vote.

The latest opinion polls show the pro-EU Macron holding a strong lead over his far-right rival Le Pen.

Macron, who has been criticized for his early celebrations after he finished nearly three points ahead of Le Pen in the first-round vote April 23, needs to convince leftist voters that his pro-business and liberal stance should not deter them from supporting him. Le Pen is expected to hammer home her favorite themes of security and identity.