An unprecedented collection of political bedfellows has coalesced this year on the reform side of the immigration debate: liberal Latino organizations and Republican operatives, the Chamber of Commerce and labor unions, faith groups and high-tech companies. And as with the Sharry contribution, some left-leaning groups are financing Republican pro-immigration groups…

“We will see a significant ramp-up of activities in August and September,” said Tom Snyder, who runs the campaign effort for the labor giant AFL-CIO. Some Republican House members have already started to soften their opposition to reform, he said, especially in districts with tens of thousands of union members. “What you are seeing is not an avalanche but a stream starting to trickle in our direction.”…

The AFL-CIO has spent $418,998 to run ads in at least six states and plans to spend more than $1 million in August and September targeting 40 Republicans in the House. The Service Employees International Union started a $200,000 radio campaign aimed at Republican congressmen in 10 districts with growing Latino populations, including four Californians: Jeff Denham (Atwater), Howard P. “Buck” McKeon (Santa Clarita), Gary G. Miller (Diamond Bar) and David Valadao (Hanford).

Two moderate Republican organizations also have participated. The American Action Network spent $182,085 on television ads, and Americans for a Conservative Direction spent $105,251 for ads in six states, according to Kantar Media.