Whom to Blame:

House Judiciary Committee Chairman F. James Sensenbrenner, Jr. (R-Wis.), the author of the previously rejected REAL ID Act (similar text, I believe) thanks several senators for passage of the Real ID rider. The quote, as reported by U. S. NewsWire:

"I am grateful for the White House's strong support of this border security legislation. In addition, Senators Frist, McConnell, Santorum, Specter, Kyl, Sessions, Brownback, DeWine, and Cornyn were among those very helpful in shepherding this legislation through the Senate and I wish to thank them."