MACKINAC ISLAND, Mich. — Sen. Ted Cruz says he will fight “with every breath” to stop the health care overhaul, even if it means shutting down segments of the federal government. That approach, warns former Florida Gov. Jeb Bush, is “quite dicey” politically for Republicans.

A clear divide over President Barack Obama’s health care law separates the emerging field of potential 2016 GOP presidential candidates. And it offers a preview of the battle Republicans nationwide will fight in their effort to build the party and win back the White House.