House Budget Chairman Paul D. Ryan was critical of The Heritage Foundation study predicting a heavy cost to the taxpayer if Congress approves an immigration overhaul that includes a path to citizenship.

In a statement provided to CQ Roll Call, the Wisconsin Republican had this to say about the Heritage report that the Senate bill’s “amnesty” component would cost taxpayers $6.3 trillion over several decades: “The Congressional Budget Office has found that fixing our broken immigration system could help our economy grow. A proper accounting of immigration reform should take into account these dynamic effects.”

Heritage defended its study during its unveiling Monday, saying its methodology adheres to that recommended by the National Academy of Sciences.