Arizona is sending 225 National Guard troops to the U.S./Mexico border and Gov. Doug Ducey said more troops would be deployed on Tuesday.
Arizona joins Texas, which sent 250 Guard troops to the border Friday.
The other two border states, New Mexico and California, have not called up any guardsmen, although New Mexico's governor has indicated that the state will participate in the activation. California's governor has not said what his state will do.
U.S. Defense Secretary James Mattis signed an order last week authorizing up to 4,000 National Guard troops to secure the border. The order provided Pentagon funding for the troops through September.
