He's stayed quiet on the subject other than to issue a letter accompanying California's offer to deploy the National Guard to combat transnational crime - but not participate in any immigration enforcement.
California has rejected President Trump's effort to send National Guard troops to the Mexican border because the work is considered too closely tied to immigration enforcement.
The Defense Department said Monday the Trump and Brown administrations have not yet reached agreement on the terms of the California National Guard's deployment - and that negotiations continue. "It will not be a mission to round up women and children or detain people escaping violence and seeking a better life".
But Brown allegedly insisted that California's troops haven't anything todo with immigration authorities. On Monday, a top Customs and Border protection official told the Associated Press that California had rejected the federal government's terms.More news: Kellyanne Conway On James Comey: 'This Guy Swung An Election'
The Associated Press reports that California told federal officials it would not allow its troops to fix and repair vehicles, operate remotely controlled surveillance cameras to report suspicious activity, operate radios or provide "mission support".
"California Governor Jerry Brown does the ideal thing and delivering the National Guard to the Border".
Brown last week characterized his choice to donate troops because a welcome infusion of support that was funded to fight multinational criminal gangs and drug and firearms smugglers.
Brown's announcement last week did not address what specific jobs the California Guard would and would not do and or answer the thorny question of how state officials would distinguish work related to immigration from other duties.More news: Allegiant Air under fire following '60 Minutes' safety report
Discussions between Sacramento and federal officials hit a roadblock over the weekend, when state authorities refused to agree to let guardsmen do vehicle maintenance and other jobs outlined in an initial federal plan, according to the AP's report.
Other border state governors, though, have supported Trump's plans to deploy the National Guard to the border.
Even with California's Guard mobilization, Trump would have fallen short of his proposed deployment of at least 2,000 troops to the border.
'The California National Guard has indicated that they will not perform those missions as we know them to be right now, ' Salesses said, though he noted that conversations were ongoing. The officials spoke to The Associated Press on condition of anonymity because they were not authorized to discuss the matter.More news: African leaders urged to emulate, sustain Winnie Mandela's legacies