Via The Hill:

Legalizing an estimated 11 million illegal immigrants will cost taxpayers at least $6.3 trillion over the coming decades, according to a study released Monday by the Heritage Foundation.

The study projects illegal immigrants would receive $9.4 trillion in government benefits and pay only $3.1 trillion in taxes over their lifetimes if they gain lawful status under comprehensive immigration reform pending in the Senate.

“No matter how you slice it, amnesty will add a tremendous amount of pressure on America’s already strained public purse,” said Robert Rector, Heritage’s senior research fellow in domestic policy studies.

The Senate Judiciary Committee is set to mark up this week the 844-page immigration reform bill crafted by the Gang of Eight.