(CNN) – Continuing the debate over gun rights after Friday's Aurora, Colorado movie theatre shooting, Mitt Romney on Monday argued there was no need for new gun laws and stood by legislation he signed as Massachusetts governor banning assault weapons.
"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," Romney said on CNBC.
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He continued: "There are–were, of course, very stringent laws which existed in Aurora, Colorado. Our challenge is not the laws, our challenge is people who, obviously, are distracted from reality and do unthinkable, unimaginable, inexplicable things."
The shooting on Friday, which left 12 people dead and 58 wounded, ignited fierce debate over the weekend and placed the presidential candidates in the spotlight over their positions on gun rights.
Romney's remarks against new laws don't stray too far from similar comments from the White House this weekend. Speaking aboard Air Force One as the president flew Sunday to meet with families of those killed, White House Press Secretary Jay Carney said Obama did not have plans to push for new legislation in light of the Colorado massacre.
"The president's view is that we can take steps to keep guns out of the hands of people who should not have them under existing law. And that's his focus right now," Carney said, adding it was too early to determine how the issue would play in the election. Meanwhile, some have pointed to the president's 2008 campaign promise to reinstate a federal ban on assault weapons.
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."
The two campaigns took a pause this weekend, pulling their attack ads from the air and breaking from the campaign trail to reflect on the shooting.
Monday morning, however, the campaigns largely resumed their activities, as both teams went on the attack through press releases and as the candidates had campaign appearances on their schedules.
Romney said Monday the campaigns were back "under way" but with a different tone.
"Yes. I think we are, but we're starting also with a level of thoughtfulness and seriousness that I think is appropriate in the aftermath of a tragedy of this nature. Obviously, the campaigns are under way," he said. "We're talking about our respective views and at the same time, our hearts are heavy as we think about the funerals that'll be held this week and the families that have been so tragically altered by virtue of the loss of life."
– CNN's Kevin Liptak contributed to this report.