The annual march has become something of a magnet for white supremacists and far-right groups from across Europe since it began in 2009.

As Poland has moved further to the right, the rally has grown. The right-wing Law and Justice Party, which was voted into power in 2015, has moved the nation from liberal European cooperation to an inward-facing agenda.

The slogan for Saturday’s march, “We want God,” comes from an old Polish nationalist song. President Trump quoted the phrase during his visit this year.