(CNN) -- Mitt Romney on Wednesday reiterated his position that new gun laws are unnecessary in the wake of the Colorado movie theater massacre that left 12 dead and dozens wounded last week.
"Well this person shouldn't have had any kind of weapons and bombs and other devices and it was illegal for him to have many of those things already," Romney said in an interview with NBC. "But he had them. And so we can sometimes hope that just changing the law will make all bad things go away. It won't."
Romney argued the more "essential" task at hand involves tackling individual mindsets, rather than gun legislation.
"Changing the heart of the American people may well be what's essential, to improve the lots of the American people," he said.
His comments came in an NBC News interview in London, where he starts an overseas trip that takes him to the Olympic Games opening ceremony on Friday, then to Israel and Poland.
The presumptive Republican presidential nominee first articulated his position on gun control on Monday, telling CNBC that the challenge is not the laws, but "the people."
"I still believe that the Second Amendment is the right course to preserve and defend and don't believe that new laws are going to make a difference in this type of tragedy," he said Monday.
As governor of Massachusetts, Romney signed a 2004 extension of a ban on assault weapons, at the time saying "These guns are not made for recreation or self-defense. They are instruments of destruction with the sole purpose of hunting down and killing people."
Also as governor, Romney enacted a statewide "Right to Bear Arms Day," which is held on May 7 to "honor law-abiding citizens and their right to 'use firearms in defense of their families, persons, and property for all lawful purposes, including common defense'," according to his campaign website.
In 2006, ahead of his bid for the 2008 Republican nomination, he became a lifelong member of the NRA.
Asked Monday about the assault weapons ban, Romney said the legislation came as a bipartisan effort from both those who "were for additional gun rights and those that opposed gun rights."
"The idea of one party jamming through something over the objection of the other tends to divide the nation, not make us a more safe and prosperous place," he said. "So if there's common ground, why I'm always willing to have that kind of a conversation."