Politico's Jake Sherman and Seung Min Kim have published an important article taking readers inside the Republican camp and reporting on what the document being released this month will contain. From the story:
The document, which has been kept under wraps until now, will call for beefed-up border security and interior enforcement, a worker verification system for employers and earned legal status for the nation’s undocumented immigrants, according to multiple sources familiar with the discussions. It will also call for reforms to visa programs and a system to track those in the country legally.

The draft principles will also include a promise that immigration reform will be done on a step-by-step basis and will foreclose the possibility of entering into conference negotiations using the Senate’s comprehensive package — pledges that could soothe some Republicans
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A lot of Republicans are still pessimistic they'll get their act together this year, but there is still an interest in releasing the principles and aiming to move a bill in 2015. Of course, they could face the wrath of Latino voters - again - if they continue to delay.