From left, Sen. Chuck Schumer, D-N.Y., standing, Sen. Orrin G. Hatch, R-Utah, and Sen. Chuck Grassley, R-Iowa, confer as the Senate Judiciary Committee meets on immigration reform on Capitol Hill in Washington, Thursday, May 9, 2013. A bill to enact dramatic changes to the nation's immigration system and put some 11 million immigrants here illegally on a path to citizenship is facing its first congressional test as the Senate Judiciary Committee begins considering proposed changes to the 844-page legislation. (AP Photo/J. Scott Applewhite)WASHINGTON (AP) — The bipartisan coalition at the back of a contentious overhaul of immigration rules caught collectively on a vital early collection of take a look at votes Thursday, turning again challenges from conservative critics because the Senate Judiciary Committee refined law to steady the nation's borders and offer eventual citizenship to millions dwelling illegally in the USA.