"Is that your response, a laugh?" host George Stephanopoulos asked on ABC's "Good Morning America."
Biden laughed again before saying, "I'd rather not make this story about Donald Trump, so I'm going to restrain myself."
"But the truth of the matter is that one of the problems we've had is getting funding for law enforcement from his party, and maybe he'll come forward and be supportive of more support for community policing," Biden added.
Trump, the presumptive Republican presidential nominee, declared himself the "law and order candidate" during a speech Monday that touched on recent violence involving police officers while attacking Hillary ClintonHillary Diane Rodham ClintonMeghan McCain: 'SNL' parodies made me feel like 'laughing stock of the country' Hill: Trump reelection would spur 'one constitutional crisis after another' Trump defends indicted GOP congressman MORE, his Democratic counterpart, as "unlawful" over her emails.