Advocates have long said the presence of police on school campuses  could negatively affect the learning environment.  Now, they’re renewing their calls to remove officers from schools -- and this time -- administrators are paying more attention.

<p>Advocates have long said the presence of police on school campuses&nbsp; could negatively affect the learning environment. &nbsp;Now, they&rsquo;re renewing their calls to remove officers from schools -- and&nbsp;this time -- administrators are paying more attention.</p>

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