The 844-page immigration reform draft written by the Senate Gang of Eight includes more than 20 allowances for unrestricted spending for everything from a Comprehensive Immigration Reform Trust Fund to radios for state and local cops, raising concerns among fiscal conservatives that the bill is too expensive.

The wording of the spending language varies in the language, but it is sized up in the oft-used phrase: "such sums as may be necessary."

Two congressional advisors said on background that open-ended funding in the bill will come under attack, especially since it already includes $2 billion for border security and other spending plans.

"In an era in which the federal government currently spends more than $1 trillion a year than it takes in, adding on a new, unlimited spending commitment makes no sense at all, and is a window into the mindset of the folks who drafted this budget-busting bill," one adviser told Secrets.