PHOENIX -- Lawmakers in states across the country say they're joining to work on proposed legislation denying U.S. citizenship to children born in this country to parents who are illegal immigrants.

Republican state Sen. Russell Pearce, the sponsor of Arizona's 2010 law targeting illegal immigration, says the national group intends to have model legislation that could stand a constitutional challenge.

The effort comes amid calls to change the Constitution's 14th Amendment to deny automatic citizenship to U.S.-born children of illegal immigrants.

Pennsylvania state Rep. Daryl Metcalfe held a news conference Tuesday announcing the effort. Pearce and other Arizona lawmakers also planned to meet with reporters.