Former CNN anchor Glenn van Zutphen explains how U.S. President Donald Trump's insistence on funding for a border wall -- which he'd initially declared that Mexico would pay for -- shut down federal government in Christmas week.

<p>Former CNN anchor Glenn van Zutphen explains how U.S. President Donald Trump's insistence on funding for a border wall -- which he'd initially declared that Mexico would pay for -- shut down federal government in Christmas week.</p>

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