Evidently, the governor will condemn the "political theater" over Trump's border wall, and he will also pull California's 360 troopers back from the border so they can focus on "real threats" like managing wildfires throughout the state.
Newsom, who visited one of those shelters a month before he was sworn into office, and other California state leaders have described what Trump has called a crisis at the border as "self-induced" by the president.
"This whole border issue is manufactured", Newsom said on Monday of Trump's portrayal of the situation.
Now, two of the four states which share the Southern Border with Mexico are doing just that.
Last week, Lujan Grisham, the Governor of New Mexico ordered the National Guard to withdraw deployment from her state, saying "I reject the federal contention that there exists an overwhelming national security crisis at the Southern border".
California has repeatedly styled itself as the flagship resistance state to the Trump administration's policies.
The California governor plans to split his state's National Guard troops on the border into three new deployments. During a recent visit to San Diego, Newsom said "we should be celebrating" migrants who seek asylum legally and contrasted California's efforts to assist them - including a $25 million outlay in his first budget proposal - with what he called Trump's disingenuous narrative "that somehow these caravans are coming in to create havoc". The Pentagon has sent thousands of troops to points along the southern border.
Trump's demand for $5.7 billion United States to help build a wall led to a 35-day partial USA government shutdown that ended last month without the president getting wall funding. When Brown, a fellow Democrat, approved the mission in April, he said no California troops would participate in immigration-related activities.
The announcement comes the day before the California governor's State of the State address, set for this Tuesday, February 12.
Trump has deployed an extra 3,750 US troops on the border this month. 110 members are expected to work with the California Department of Forestry and Fire; 100 members will be transferred to intelligence operations against drug cartels.
She said that some troops would remain stationed in Hidalgo County and surrounding southwestern New Mexico counties in order to help with the ongoing humanitarian needs of communities there, which, her office, had seen large groups of families, women and children, crossing the border in recent months. "But then we repealed and healed".