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The families were among "thousands" at the White House for the 135th annual Easter Egg Roll, according to a White House pool report. About 35,000 people were on the South Lawn for the event, which included games, food and other activities.

The attendance of the Newtown families comes as lawmakers continue to push for measures to reduce gun violence.

In the aftermath of the December shooting massacre at Sandy Hook Elementary School, President Obama urged Congress to enact a number of new measures, including universal background checks on gun purchases and bans on the sale of assault weapons and high-capacity magazines. The massacre resulted in 28 dead, including 20 children, and renewed debate over the nation's gun laws.

The Senate is expected to vote on a gun bill which includes provisions expanding background checks and enacting tougher penalties on gun traffickers. But Senate Majority Leader Harry ReidHarry ReidThe Memo: Trump pulls off a stone-cold stunner The Memo: Ending DACA a risky move for Trump Manchin pressed from both sides in reelection fight MORE (D-Nev.) excluded many more controversial provisions backed by the White House, claiming they could drag down the entire gun bill. Reid has said he would allow votes on banning assault weapons and high-capacity clips as amendments.

Last week, Obama made an emotional plea at a White House, where he was joined by mothers of victims to gun violence, including some from Newtown.

"Shame on us if we've forgotten," said Obama of the tragedy, urging lawmakers to pass meaningful gun control.

Recently, Vice President Biden, who headed the White House task force on gun violence, has been calling his former colleagues to rally support for new gun measures. Biden recently also sat down privately with Republican senators John McCainJohn Sidney McCainSenate's defense authorization would set cyber doctrine Senate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Overnight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions MORE (Ariz.), Lindsey GrahamLindsey Olin GrahamTop Louisiana health official rips Cassidy over ObamaCare repeal bill Senate Dems hold floor talk-a-thon against latest ObamaCare repeal bill Overnight Defense: Senate passes 0B defense bill | 3,000 US troops heading to Afghanistan | Two more Navy officials fired over ship collisions MORE (S.C.), and Johnny IsaksonJohn (Johnny) Hardy IsaksonHouse sends resolution urging Trump to condemn white supremacists Senate approves resolution condemning white supremacist groups The Hill's 12:30 Report MORE (Ga.), to discuss gun control.