Matthew Casey/KJZZ

Juan Ciscomani, senior advisor to Gov. Doug Duceyfor regional and international affairs.

The Arizona-Mexico Commission officially starts its 60th birthday celebration Wednesday at a resort in the north part of the Valley.

Governors, members of Congress and a former Mexican ambassador to the United States are scheduled to take part in the so-called summit.

State officials say there are about 700 people registered for the biannual event that was expanded to three days.

“Because the demand for workshops was that much,” said Juan Ciscomani, senior adviser to Gov. Doug Ducey for regional and international affairs.

National issues that test the bond between Arizona and Sonora are nothing new, Ciscomani said. What has changed is that pressure is heavier and more divisive in both countries, he said.

“I can say that the relationship between Arizona and Sonora, and more specifically between Gov. Pavlovich and Gov. Ducey, is unbreakable,” Ciscomani said.

Ducey and Pavolovich are scheduled to take part in a forum on the future of North American trade on Friday.