WASHINGTON (AP) — House Republican leaders poised to revive efforts to overhaul the immigration system with new broad policy principles are facing a direct challenge from a GOP senator who is warning against a headlong rush toward reform.

Alabama Sen. Jeff Sessions, the top Republican on the Senate Budget Committee, delivered a 30-page package to all 232 House Republicans on Wednesday that offers a point-by-point rebuttal to the expected standards that House Speaker John Boehner and other leaders plan to circulate this week among GOP members at their annual retreat.