(CNN) Hillary Clinton grew emotional on the campaign trail Monday while introducing a mother whose child was killed during the Sandy Hook Elementary School shooting.

Clinton got choked up while bringing on to the stage Nicole Hockley, the mother of Dylan Hockley, a 6-year-old killed in Newtown, Connecticut, in 2012.

The families of those killed in Newtown "have taken the unimaginable grief that they have been bearing and have tried to be the voices" for gun violence victims, Clinton said, her voice breaking.

"I want you to introduce yourself and maybe talk about what you and other parents are trying to do to get the changes that are necessary," Clinton said, turning to Hockley.

It's the latest event in a series of emotionally heated campaign stops in New Hampshire on Monday. Earlier she made a passionate attack on Republicans over the House Select Committee on Beghanzi, which she called "nothing but a partisan exercise."

Read More