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President Donald Trump and members of U.S. Customs and Border Protection viewed prototypes of the Mexican border wall in San Diego Tuesday.

Trump spent most of his visit out of earshot of the press, but walked over to make brief remarks during his tour.

He said he looked at the current border "fence" and saw where holes had been cut and re-plugged by authorities.

"The fence is not strong enough, it's not the right idea," he said.

Speaking with a CBP agent, Trump asked why they want a wall with "see-through" capability.

The agent said that behind a wall that is opaque, large groups of illegal immigrants and smugglers can band together and rush over the wall at once without American authorities knowing.

Trump agreed, and said that without a proper "wall system, we're not going to have a country."

Trump's plan for a wall in San Diego flies in opposition to the state's governor, Jerry Brown, who does not want the White House to build a barrier with Baja California, Mexico.

"Governor Brown's done a very poor job running California," Trump said. "The place is totally out of control."

Watch more above, and part two below.

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