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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 ReidConservative Senate candidate calls on GOP to end filibuster Ex-Reid aide: McConnell's 'original sin' was casting ObamaCare as 'partisan, socialist takeover' GOP faces growing demographic nightmare in West 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 McCainMr. President: Now is the time to apologize to John McCain Canada responds to transgender ban: All are welcome to join Canadian forces Dems don’t want to help GOP improve repeal bill MORE (Ariz.), Lindsey GrahamLindsey GrahamPassing the DACA legislation will provide relief to children living in fear GOP senators: House agreeing to go to conference on ObamaCare repeal Graham, Booker writing bill to prevent Trump from firing special counsel MORE (S.C.), and Johnny IsaksonJohnny IsaksonOvernight Finance: House votes to repeal arbitration rule | Yellen, Cohn on Trump's list for Fed chief | House passes Russia sanctions deal | GOP centrists push back on border wall funding Senators urge quotas on Canadian lumber, consultations with Congress Trump labor board nominees advance in Senate MORE (Ga.), to discuss gun control.