Jeff Denham (R-CA) has now made H.R. 15, the House's comprehensive immigration bill officially bipartisan when he endorsed the plan. H.R. 15 is basically the Senate bill modified to substitute a bipartisan House border security bill for the controversial Corker-Hoeven border surge language. From
On Sunday, California Congressman Jeff Denham has become the first Republican to co-sponsor H.R. 15, the immigration bill that the Democrats introduced on October 2. Rep. Denham represents California’s 10th Congressional district, which is in the state’s agricultural breadbasket of the Central Valley.
Expressing that the nation cannot wait anymore, Denham said in a statement, “I support an earned path to citizenship to allow those who want to become citizens to demonstrate a commitment to our country, learn English, pay fines and back taxes and pass background checks. This is a common-sense solution to our broken system. I also support a faster pathway for the children who were brought here by their parents through no fault of their own, who have been raised in America and educated in our schools and have no other country to call home.”

At least two dozen other Republicans are on record endorsing positions similar to H.R. 15 so it seems likely Denham won't be the last.