Those attending the rally said they support Trump's progress and policies on immigration, jobs and his Supreme Court appointee.
Some acknowledged it was hard to support the GOP president in a Democratic-leaning city like Los Angeles.
"It's been hard, especially in L.A.," said Trump supporter Jacob Ellenhorn.
"The city is completely blue. It's a Democratic stronghold. But I think that there's also kind of a strength that was given to conservative voices because Trump is the president, Republicans are in control of the three branches of government right now. That really helped and emboldened a lot of people."