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Demonstrators turn on mobile phones to illuminate a bond of solidarity with the Catalan pro-independence prisoners. Pro-independence demonstrators demonstrate in Barcelona in support of the leaders of social movements in Catalonia imprisoned since October 16, on November 16, 2017. (Photo by Miquel Llop/NurPhoto via Getty Images)

Demonstrators turn on mobile phones to illuminate a bond of solidarity with the Catalan pro-independence prisoners. Pro-independence demonstrators demonstrate in Barcelona in support of the leaders of social movements in Catalonia imprisoned since October 16, on November 16, 2017. (Photo by Miquel Llop/NurPhoto via Getty Images)

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Pro-independence demonstrators demonstrate in Barcelona in support of the leaders of social movements in Catalonia imprisoned since October 16, on November 16, 2017. (Photo by Miquel Llop/NurPhoto via Getty Images)

Pro-independence demonstrators demonstrate in Barcelona in support of the leaders of social movements in Catalonia imprisoned since October 16, on November 16, 2017. (Photo by Miquel Llop/NurPhoto via Getty Images)

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Thousands of people are gathered in the Plaza de Sant Jaume in Barcelona to protest the imprisonment of several members of the Catalan government after proclaiming the independent republic of Catalonia, in Barcelona on November 3, 2017. A judge in Madrid ordered eight ministers of Catalonia's deposed government to be held in jail pending further probes into their role in the region's quest for independence. They are all accused of sedition, rebellion and misuse of public funds. (Photo by Miquel Llop/NurPhoto via Getty Images)

Thousands of people are gathered in the Plaza de Sant Jaume in Barcelona to protest the imprisonment of several members of the Catalan government after proclaiming the independent republic of Catalonia, in Barcelona on November 3, 2017. A judge in Madrid ordered eight ministers of Catalonia's deposed government to be held in jail pending further probes into their role in the region's quest for independence. They are all accused of sedition, rebellion and misuse of public funds. (Photo by Miquel Llop/NurPhoto via Getty Images)

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Pro-independence demonstrators demonstrate in Barcelona in support of the leaders of social movements in Catalonia imprisoned since October 16, on November 16, 2017. (Photo by Miquel Llop/NurPhoto via Getty Images)

Pro-independence demonstrators demonstrate in Barcelona in support of the leaders of social movements in Catalonia imprisoned since October 16, on November 16, 2017. (Photo by Miquel Llop/NurPhoto via Getty Images)