Blumenthal Calls Wants to Revive Senate Background Check Bill

On Sunday's CBS Face the Nation, Connecticut U.S. Senator Richard Blumenthal called for the U.S. Senate to revive the "expanded" background check bill after the Friday stabbing and shooting deaths at UC Santa Barbara:

“I really since hope that this…unimaginable, unspeakable tragedy will provide an impetus to bring back measures that would keep guns out of the hands of dangerous people who are severely troubled or deranged like this young man was,” he said. 

It's been pointed out half of the victims were stabbed, and the firearms were purchased legally in a state the Brady Campaign considers the model for gun control.  It has also been pointed out that there were warning signs regarding this troubled individual.  Given what we know about the incident, someone please tell me how the gun control measure in question would have stopped what occurred at UCSB? Oh wait, Blumenthal acknowledged as much:

“Obviously not every type of gun violence is going to be stopped by laws out of Washington, but at least we can make a start,” he said. “I’m going to urge that we bring back those bills, maybe reconfigure them to center on mental health, which is a point that we can agree. We need more resources to make the country healthier and to make sure that these kinds of horrific, insane, mad occurrences are stopped. The Congress will be complicit if we fail to act.” 

So, in state that has stricter gun laws than those of the federal government, this type of incident occurred, and we are supposed to believe that more federal gun control would stop at least some of these from happening?