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Hillary Clinton to blast Donald Trump's gun proposals at Florida gathering

Democratic front-runner Hillary Clinton is primed to attack Donald Trump's proposals on firearms as dangerous ideas for America's children just one day after the GOP's presumptive presidential nominee addressed the National Rifle Association's convention and earned the group's endorsement.

Clinton, who has positioned herself as a staunch advocate on gun control, will serve as a keynote speaker Saturday night at the third annual "Circle of Mothers" conference in Fort Lauderdale, hosted by the Trayvon Martin Foundation. Past attendees have included family members of victims from the Sandy Hook Elementary School and Aurora movie theater massacres, along with the close relatives of police shooting victims Michael Brown, Eric Garner and Tamir Rice.

Trump gains endorsement of the NRA

A Clinton aide tells CBS News that at the gathering, which aims to empower mothers who have lost children to gun violence, the candidate will slam Trump's divisive rhetoric and contrast it to her own unifying message on justice and equality.

Clinton will emphasize how Trump's ideas to rid the country of gun-free zones, especially in America's schools, will make children less safe. She is set to focus on her own opposition to the NRA, the pro-gun lobby that gave their support to Trump Friday, and how she will not be silenced by the group.

Clinton's address comes just one day after the Republican nominee sharply criticized her policies at the NRA convention, claiming that Clinton would "abolish" the Second Amendment.

"Crooked Hillary Clinton is the most anti-gun, anti-Second Amendment candidate ever to run for office," Trump told an audience of NRA members Friday.

At their Kentucky convention, the NRA ramped up its own attacks of Clinton, who supports universal background checks and who has voted to end immunity for gun manufacturers.

Wayne LaPierre, the executive vice president of the NRA, warned that a Clinton administration would mean "you can kiss your guns goodbye." Chris Cox, the NRA's executive director, later added that, if she were elected president, Clinton would put "a radical gun activist in Scalia's seat as soon as she can," referring to Supreme Court Justice Antonin Scalia, who died in February.

CBS News' Hannah Fraser-Chanpong contributed to this report.

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