FILE – In this Sept. 2, 2019 file photo London Mayor Sadiq Khan, right, speaks at a news conference alongside Warsaw Mayor Rafal Trzaskowski in Warsaw, Poland. A pro-European liberal, Trzaskowski, has recently joined the race for the nation's president and has emerged as the main challenger to incumbent President Andrzej Duda who had previously seemed certain to win. The date of the vote is yet to be announced.(AP Photo/Czarek Sokolowski)
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