"Ninety Americans a day die from gun violence," she said.

Shortly after the shootings she tweeted, "I refuse to accept this as normal. We must take action against gun violence now."

Before the shootings, she delivered strong words. She spoke of finding what she called common sense solutions to gun violence.

Her husband, Bill Clinton, signed the federal assault weapons ban when he was president.

She said Americans support responsible gun ownership. Clinton told her supporters it is time to stand up to the gun lobby.

"It is time for us to say we're going to have comprehensive background checks and close the gun show loophole," Clinton said.

Clinton maintains that her plan is supported by gun owners.

A Quinnipiac University poll released in September shows gun owners do support background checks.

"Eighty-three percent of gun owners support that, because they want to be responsible and not let guns fall into the wrong hands," Clinton said.

While Clinton's remarks in Central Florida came in the hour before the California shooting, the platform plank has been part of her campaign for weeks. She has called it sensible gun control.