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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 ReidOvernight Tech: The FCC and Cybersecurity | Spectrum auction fails again | Google's search for a conservative Cures bill clears first Senate hurdle Dem senator had 'constructive' talk with Trump 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 McCainThe trouble with Rex Tillerson   Senate: Act now to save Ukraine A Cabinet position for Petraeus; disciplinary actions for Broadwell after affair MORE (Ariz.), Lindsey GrahamLindsey GrahamThe trouble with Rex Tillerson   A Cabinet position for Petraeus; disciplinary actions for Broadwell after affair Pentagon should have a civilian chief to give peace a chance MORE (S.C.), and Johnny IsaksonJohnny IsaksonGOP senators wary of nuking filibuster SENATE: Republicans defy odds to keep majority A banner year for U.S. leadership on aid effectiveness MORE (Ga.), to discuss gun control.