Tomorrow, the U.S. president will travel to the outskirts of San Diego to inspect the eight border wall prototypes.
He referenced President George W. Bush, who, according to Brown said, "For decades, California has been the place where the future happens first".
Immigrant activists, church leaders and local elected officials are calling for demonstrations to show President Donald Trump that border communities oppose his plans to build a towering wall on the California-Mexico line.
Trump supporters are organizing their own rally to celebrate the presidential visit.
Trump's arrival will come just days after his Justice Department sued to block state laws created to protect people living in the USA illegally. "We are fighting to make your jobs safer and to help you reduce crime in America".
"The president campaigned on this, he talked about it extensively and he's the president and this is something that he is not going to back away from", she said.
The Justice Department has filed a lawsuit against the state, claiming three recently passed state laws are deliberately interfering with federal immigration enforcement.
California Governor Jerry Brown gestures as Attorney General Xavier Becerra laughs during a press conference at the California State Capitol on March 7, 2018 in Sacramento, California.
However, California - a state overrun with left-wing progressive activists groups and lawmakers - has so far proven to be a problem for the president's agenda. The commission, which controls the state's entire coastline, said it will not not issue the pipeline permits drillers would need. The group has been active in protesting Trump's policies.
Though Trump's California visit appears aimed at promoting his border wall plan, Congress has not authorized funding for the project.
California is also where the Trump administration has erected the prototypes for its proposed border wall - and it is that site that will be the main focus of Trump's excursion to the Left Coast. The Senate rejected four immigration bills last month that would earmarked as much as $25 billion federal dollars for the controversial project.