Damn but she is dumb. Pretty much by definition you cannot prevent senseless acts. Doesn't matter if it is related to gun violence or teenagers trying to skateboard off the porch roof into the pool. People are going to commit senseless acts, period. You cannot prevent that without some fascist utopia of regulating all human behavior. Unless you explicitly list everything that is allowed, and everything that is banned, people are going to do stupid s**t. Even then, people are still going to do stupid stuff and criminals are still going to disregard laws. ergo, you can't legislate us into safety from violence. We can only be prepared to defend ourselves and make violence an unattractive option.
Also by definition, anything the government does that in any way involves restricting citizens' access to firearms is on very questionable ground. The 2nd Amendment is pretty clear on that: shall not be infringed. Anything that is an infringement - background checks, taxes, magazine capacity limits, feature restrictions, feature requirements (eg. smart guns) - any of it is in some way an infringement and thus unconstitutional.
Also the glib use of the word “senseless” obscures the fact that there is a perverted sense in most of them. This is not like little Johnny stumbling across a gun and not even understanding what it is. We are talking about people who embrace violent attitudes for perverted reasons. These people may yet, however, understand armed opposition. And since nobody can put police in their pocket, we need to not make it impossibly difficult for them to put arms in their pocket.