Arizona, New Mexico, and Texas pledged on Monday to send about 1,600 National Guard members to the U.S.-Mexico border, responding to President Donald Trump's plan to use the military to help fight illegal immigration and drug trafficking.

Texas Gov. Greg Abbott said he would add about 300 troops a week to the 250 members of the National Guard whose deployment was announced Friday until the total number reaches at least 1,000 troops. Arizona officials announced they were sending 225 National Guard members to the border Monday and would deploy another 113 on Tuesday, reports the Associated Press.

And New Mexico Gov. Susana Martinez's office said that more than 80 troops would deploy later this week. They will be the first of an expected 250 Guard members from New Mexico to serve on the border.

California Gov. Jerry Brown has not made a public commitment to sending troops from his state's National Guard.