Justin Smith, the sheriff of Larimer County, dismissed the visit as “a victory lap” and “a slap in the face to all Coloradans.”
The Colorado Sheriffs Association vocally opposed the gun control package, while the Colorado Association of Chiefs of Police supported it. Sheriffs are elected in Colorado and generally are Republican.
Several dozen gun supporters also booed Obama’s motorcade as it arrived at the academy.
Obama’s trip came a day after a study commissioned by the National Rifle Association, which opposes Obama’s gun control measures, recommended that schools have trained, armed staffers to increase security for students. The American Federation of Teachers denounced the proposal.
There were signs that sweeping congressional efforts to address gun violence have flagged.
Key senators have been unable to reach a bipartisan compromise that would require federal background checks for gun transactions between private individuals. Federal background checks currently apply only to sales handled by licensed gun dealers.
After Denver, Obama was headed to San Francisco to attend fundraisers Wednesday and Thursday for Democratic Party organizations.
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