FLORENCE, ARIZONA - JANUARY 15: Republican governor candidate for Arizona Kari Lake (L) speaks as former President Donald Trump looks on at a rally at the Canyon Moon Ranch festival grounds on January 15, 2022 in Florence, Arizona. The rally marks Trump's first of the midterm election year with races for both the U.S. Senate and governor in Arizona this year. (Photo by Mario Tama/Getty Images)

TUCSON, Ariz. (AP) — Arizona Gov. Doug Ducey has already helped block one of former President Donald Trump’s allies from winning the Republican nomination for governor in a crucial battleground state. Now Ducey is part of a burgeoning effort among establishment Republicans to lift up little-known housing developer Karrin Taylor Robson against former television news anchor Kari Lake. What once looked like an insurmountable lead for Trump-backed Lake could end in a more competitive finish on Aug. 2. On Monday, former Vice President Mike Pence endorsed Robson, underscoring the divide between the GOP establishment and Trump. Both Pence and Trump will campaign in the state on Friday for their candidates.