President Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE is expected to face protests when he arrives in California on Tuesday to survey prototypes of his long-touted border wall.

Demonstrations are being planned on both sides of the border to protest Trump's visit to San Diego, according to The Associated Press.

Trump is set to see prototypes of the border wall, which have been constructed near the U.S.-Mexico border near San Diego.

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Police are setting up a "temporary restriction area" around the site of the wall prototypes in anticipation of large rallies and protests in the area, according to The Washington Post. Authorities have vowed to prosecute anyone who brings "implements of riot" to protests, including knives, bricks and guns.

Even in the day before Trump's visit, signs of protests were visible. Activists and elected officials gathered in San Diego's Chicano Park on Monday to call for demonstrations opposing the border wall, the AP reported.

And Monday evening, a crowd of roughly 250 people took to the streets of downtown San Diego to protest the border wall.

California has emerged as a hotbed of opposition to Trump's policies, particularly those related to immigration.

The president's visit also comes about a week after the Justice Department sued California over the state's so-called sanctuary laws, which the administration claims obstruct federal immigration officials from doing their jobs.