Matthew McConaughey (Image via Getty Images)Matthew McConaughey held back tears as he spoke to reporters at the White House on Tuesday about visiting the families of the victims of the Robb Elementary School massacre in his hometown of Uvalde, Texas.In many respects, the actor's appearance in the White House briefing room following his and Camilla's meeting with President Joe Biden was unprecedented, as he spoke movingly in honor of the victims and their lives that were cut short, revealing extremely personal memories.When a gunman opened fire on their classroom, 19 children and two teachers were killed.Fred Guttenberg@fred_guttenbergThank you @McConaughey. You just framed this perfectly. Since my daughter Jaime was murdered in Parkland, I have tried to engage gun owners and dads to support doing more. "Responsible gun owners are fed up with the Second Amendment being abused and hijacked."168782720Thank you @McConaughey. You just framed this perfectly. Since my daughter Jaime was murdered in Parkland, I have tried to engage gun owners and dads to support doing more. "Responsible gun owners are fed up with the Second Amendment being abused and hijacked."McConaughey explicitly urged lawmakers in the United States to approve laws raising the minimum age to acquire an assault rifle from 18 to 21, bolstering background checks, and instituting red flag provisions.In an op-ed published in the Austin American Statesman earlier this week, the actor advocated for a variety of gun reform recommendations, including background checks for all gun transactions, a minimum age of 21 for purchasing assault guns, a waiting period for purchase, and statewide "red flag" regulations.Matthew McConaughey addresses school shooting in his hometown of Uvalde, TexasThree days after the catastrophic massacre that killed 19 children and two adults on May 24, McConaughey returned to his hometown, where his mother had worked as a schoolteacher. Salvador Ramos, an 18-year-old gunman, opened fire with a handgun and a rifle at Robb Elementary School.The Oscar winner claims that focusing on gun restrictions has resulted in a decades-long political impasse, and he believes that it's time to move the discourse to "gun responsibility."Matthew McConaughey said:“There is a difference between control and responsibility. The first is a mandate that can infringe on our right; the second is a duty that will preserve it. There is no constitutional barrier to gun responsibility. Keeping firearms out of the hands of dangerous people is not only the responsible thing to do, it is the best way to protect the Second Amendment. We can do both.”Reporters barraged him with questions, including one who questioned, "Are you grandstanding, sir?" However, he did not respond and exited the briefing room.Justin Baragona@justinbaragonaMatthew McConaughey: "These bodies were very different... They needed extensive restoration. Why? Due to the exceptionally large exit wounds of an AR-15 rifle. Most of the bodies so mutilated that only DNA tests or green Converse could identify them."167785050Matthew McConaughey: "These bodies were very different... They needed extensive restoration. Why? Due to the exceptionally large exit wounds of an AR-15 rifle. Most of the bodies so mutilated that only DNA tests or green Converse could identify them." https://t.co/ARz3wBcxYNAt least 17 people were also wounded by the gunman, who used an assault rifle and was killed by responding authorities.Matthew McConaughey argued that "responsible gun owners are fed up with the Second Amendment" and encouraged "both sides to look above the political problem at hand."On Monday, McConaughey visited Senate Majority Whip Dick Durbin, who chairs the influential Judiciary Committee, and on Tuesday, he met Iowa Senator Chuck Grassley, the panel's leading Republican.However, when reporters questioned what he was doing in Washington after spotting him in the US Capitol on Monday, the actor declined to respond.Grassley shared a photo of their meeting on Twitter, stating that they talked about "gun responsibility" and "school safety."Senator Dick Durbin@SenatorDurbinHad the chance to meet Uvalde native @McConaughey in DC today to discuss the horrific mass shooting at Robb Elementary as well as the larger problem of gun violence in America. We, like so many others, agree that gun safety reform is needed—I'll keep working to make that happen.35991Had the chance to meet Uvalde native @McConaughey in DC today to discuss the horrific mass shooting at Robb Elementary as well as the larger problem of gun violence in America. We, like so many others, agree that gun safety reform is needed—I'll keep working to make that happen. https://t.co/ckCAItzwrRMatthew McConaughey has a long history of activism and philanthropy, and he even considered running for governor last year. Despite several hypothetical surveys indicating that McConaughey might be a formidable contender, he decided not to run for government last November.After the Sandy Hook Elementary School massacre in 2012 (which killed 28 people) and the Virginia Tech shooting in 2007 (which killed 33 people), the shooting in Uvalde, Texas, has now become the third most fatal school shooting in American history.