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LAS VEGAS, NV - JANUARY 21:  Protesters carry signs as they make their way to Sam Boyd Stadium for the Women's March "Power to the Polls" voter registration tour launch on January 21, 2018, in Las Vegas, Nevada. Demonstrators across the nation gathered over the weekend, one year after the historic Women's March on Washington, D.C., to protest President Donald Trump's administration and to raise awareness for women's issues.  (Photo by Sam Morris/Getty Images)
LAS VEGAS, NV - JANUARY 21:  Protesters carry signs as they make their way to Sam Boyd Stadium for the Women's March "Power to the Polls" voter registration tour launch on January 21, 2018, in Las Vegas, Nevada. Demonstrators across the nation gathered over the weekend, one year after the historic Women's March on Washington, D.C., to protest President Donald Trump's administration and to raise awareness for women's issues.  (Photo by Sam Morris/Getty Images)

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    Evening news briefing from CNN

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Evening news briefing from CNN

Evening news briefing from CNN on Sunday, January 21.

Evening news briefing from CNN

Evening news briefing from CNN on Sunday, January 21.