Arizona Sens. John McCain and Jeff Flake participated in an "immigration conversation" in Mesa sponsored by the Arizona Republic.

Tuesday's event featured the two, who were members of the "Gang of Eight" who pushed a comprehensive immigration reform bill through the Senate earlier this year.

During the conversation, the Arizona senators said the immigration bill will achieve 90 percent control of the U.S.-Mexico border, and if that doesn't happen in five years another $2 billion will be poured into the effort.

The Republicans have spent part of the congressional summer recess trying to drum up public support for the plan that has stalled in the House.

Ariz. Rep. Paul Gosar, another Republican, said their efforts are going nowhere in the GOP-controlled House. He said there's no way the House will pass a bill like the Senate version that includes a path to citizenship for the 11 million people in the country without proper documentation.

The House instead will take up small immigration bills separately, starting with securing the border, Gosar said.