I followed Trump's travels through my hometown via live broadcasts and social media.
Trump also said in his remarks that he is leaning toward a see-through wall, saying "you have to know what's on the other side of the wall".
The president's arrival was awaited in the area by a cluster of police, chanting protesters and supporters clad in campaign gear, waving American flags. He said Washington will need the Mexican president's cooperation on border security and immigration.
Caddell Construction Co. of Montgomery, Alabama; W.G. Yates & Sons Construction Co. of Philadelphia, Mississippi; Fisher Sand & Gravel Co. of Tempe, Arizona; and Texas Sterling Construction Co. of Houston each won contracts to build concrete prototypes, the agency has said.
President Donald Trump Wednesday will end his first California visit as president and leave Los Angeles for St. Louis, Missouri.
"They have a lot of problems in Mexico, they have a lot of problems over there", Trump said during the visit. Reports indicate that both sides were of about equal number and tenacity.
"The state of California is begging us to build walls in certain areas", Trump said on what was his first visit to the state. Fellow GOP Rep. Duncan Hunter of Alpine joined Trump while he examined wall prototypes.
Mr Trump also criticised California governor Jerry Brown, saying he was doing a "terrible" job. "They have the highest taxes in the United States".
The president accused Gov.
"They shield criminals. You can't do that", he said. You've seen them. The media has seen them.
The president spoke with immigration enforcement officials and with Marines at Marine Corps Air Station Miramar before heading to a fundraiser in Beverly Hills.
During his speech, Trump mentioned that he planned to give the military an historic pay increase.
Air Force One landed at Los Angeles International Airport at about 3:30 p.m. Tuesday. "We have the Army, the Navy", he continued. Jerry Brown of "doing a awful job running the state", said residents would begin fleeing California to avoid its high taxes, vowed to beat the state in court and in Congress over its so-called immigrant sanctuary laws and insisted that he would build a new, bigger wall.
Richard Marosi, reporter for the Los Angeles Times covering the U.S./Mexico border.
Gerber ended up deleting the tweet and making his account protected.
Trump's visit brought him to the home turf of the resistance movement against his presidency. Tens of thousands of people enter the USA daily from Tijuana, Mexico, many on their way to work or school in San Diego.