French President François Hollande on Thursday endorsed Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE for president, saying it would complicate relations between Europe and the U.S. if Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE were elected

"The best thing the Democrats can do is to get Hillary Clinton elected," Hollande said in a newspaper article published in France's Les Echos newspaper.

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"[Trump's] slogans differ little from those of the extreme right in Europe and France: fear of the migratory wave, stigmatization of Islam, questioning of representative democracy, denouncing elites," he wrote.

In France, Hollande is facing opposition from Marine Le Pen, the leader of France's National Front party, who opposes immigration.

Le Pen has called for France to leave the European Union.

Trump praised the United Kingdom's vote to leave the EU last week.

"They took their country back, just like we will take America back," Trump tweeted.