I think in the long run this is a great idea, Congress should have the power to restrict birthright citizenship to children of citizens and permanent residents of the US. See http://www.heritage.org/Research/Reports/2005/12/Birthright-Citizenship-and-the-Constitution
However there are many issues more important and less derisive in the short run. Many people who have a superficial understanding of the issues will see this in a very negative light. WE SHOULD LOOK TO OTHER ISSUES FIRST. This will be used against us in the 2010 election and if I was the opposition I would hope that this gets nationwide attention.