A White House spokesman confirms that relatives of victims of the Newtown school attack will appear at today’s announcement of an aggressive gun control agenda for Congress.

The much-anticipated announcement is expected to launch a bitter national debate on gun control that will put the Newtown tragedy at the center of the discussion. The audience at today’s White House announcement by President Obama will also include children who wrote to the president after the Newtown massacre.

News reports say that President Obama will call for national background checks for all firearms purchases and the prohibition of assault rifles and high-capacity ammunition clips or magazines. Politico reports today that the plan will also include a proposed new federal gun trafficking law.