Asked why he thought the overhaul had a fighting chance in the House, Ali Noorani, a veteran of many immigration wars, pointed to a big green mobile billboard that had circled Capitol Hill every day this week.
Its flashing message was “Praying for immigrants. Praying for Congress.” Groups of evangelical Christians prayed on the Capitol lawn for the Senate to pass its bill. Mr. Noorani’s group, the National Immigration Forum, has worked with Southern Baptists and other large evangelical denominations to coordinate prayer campaigns and run pro-overhaul spots on Christian radio stations in states where lawmakers might be persuaded to change their views.
“In 2007, we weren’t even on the radar,” said the Rev. Samuel Rodríguez, the president of the National Hispanic Christian Leadership Conference, an evangelical group. Mr. Rodríguez said he had been on the road continuously, addressing primarily non-Hispanic Christian conferences to spread the message on the overhaul.