The former congresswoman was gravely injured during a mass shooting in 2011 in Tuscon, Arizona and since the incident she and her husband have campaigned for stronger gun laws.
“Does anyone actually believe our gun laws are too strong? Give me a break," Mr Kelly said in front of Capitol Hill.
"For years, Gabby and I have been working to get the people in this building to summon the courage to take meaningful action that make our communities safer places to live," he added.
“But despite the tragedies in places like Aurora, Newtown and Orlando, despite daily shootings in communities across America, despite senseless, deadly gun-related domestic violence, despite an epidemic of preventable suicides, despite the problem of toddlers shooting toddlers and their parents, the response from Congress has been to do nothing. Absolutely nothing.”
Giffords finished, "The nation is counting on you".
Police officers stand at the scene of a shooting near the Mandalay Bay resort and casino. Source: AAP, AP
However, the White House said on Monday it would be 'premature' to reopen the US debate on tighter gun controls in the wake of the mass shooting that left 58 people dead in Las Vegas.
"There's a time and place for a political debate, but now is the time to unite as a country," Press Secretary Sarah Sanders told the daily White House briefing.
"A motive is yet to be determined and it would be premature for us to discuss policy when we don't fully know all of the facts or what took place last night."
The IS group claimed the 64-year-old Nevada man behind the Sunday night massacre, Stephen Craig Paddock, was one of its "soldiers" but the FBI said it had found no such connection so far.
Police said Paddock, a retired accountant, killed himself before a SWAT team breached his room in the Mandalay Bay hotel overlooking the venue for the country music concert.
President Donald Trump denounced what he called "an act of pure evil" and said he would visit Las Vegas on Wednesday.
