“We’ve proved ourselves before, and we’ll prove ourselves again,” he said.

McGauley and others have been roused by the president’s call to restore order and defend the country against what Trump has called “an invasion,” as thousands of Central American migrants advance slowly through southern Mexico toward the U.S. border. Trump has insisted that “unknown Middle Easterners,” “very tough fighters,” and large numbers of violent criminals are traveling among the women, children and families heading north on foot.

The Texas Minutemen, according to McGauley, have 100 volunteers en route to the Rio Grande who want to help stop the migrants, with more likely on the way.

“I can’t put a number on it,” McGauley said. “My phone’s been ringing nonstop for the last seven days. You got other militias, and husbands and wives, people coming from Oregon, Indiana. We’ve even got two from Canada.”