Macron leads polls but turnout a big question in French vote

French President Emmanuel Macron is the clear favorite in the country's presidential vote on Sunday

PARIS -- President Emmanuel Macron is the clear favorite in France's presidential race Sunday yet a big unknown factor may prove decisive: an unprecedented proportion of people say they are unsure who to vote for or don’t intend to vote at all, bringing a large dose of uncertainty to the election.

The pro-European centrist is still comfortably leading in the polls. His main challenger, far-right leader Marine Le Pen, appears on the rise in recent days. Both are in good position to reach the presidential runoff on April 24, which would make them replay the 2017 election that Macron won handily.

There’s “no certainty,” Macron warned during his first big rally on Saturday near Paris.

“Don’t believe in polls or commentators who would sound definitive and tell you that ... the election is already done, that everything is going to be all right,” he told his supporters. “From Brexit to so many elections, what seems unlikely can happen!”