Gov. Chris Christie continues to press for support in the early primary state of Iowa, and offered a little more detail on key issues.

(AP Photo/Charlie Neibergall)

Christie made his most extensive comments yet on immigration, after insisting it is was off-limits, since he is not an official candidate.

While he did not go into great detail, he offered support for a guest worker program, primarily for agricultural workers.

Nearly 80 percent of dairy farm workers in Iowa are immigrants.