Donald Trump Jr.Don TrumpDonald Trump Jr. joins Cameo Book claims Trump family members were 'inappropriately' close with Secret Service agents Trump Jr. shares edited video showing father knocking Biden down with golf ball MORE took the stage at his father’s rally in El Paso, Texas, Monday night and told the young conservatives in the crowd they didn’t “have be indoctrinated by these loser teachers that are trying to sell you on socialism from birth.”

President TrumpDonald TrumpHead of firms that pushed 'Italygate' theory falsely claimed VA mansion was her home: report Centrists gain foothold in infrastructure talks; cyber attacks at center of Biden-Putin meeting VA moving to cover gender affirmation surgery through department health care MORE’s eldest son has been one of the top campaigners for the president's reelection bid and warmed up the crowd for him in between chants of “USA!”

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“I love seeing some young conservatives, because I know it’s not easy,” Trump Jr. told the crowd. “Keep up that fight. Bring it to your schools."

“You don’t have to be indoctrinated by these loser teachers that are trying to sell you on socialism from birth, you don’t have to do it,” he said as the crowd cheered him on.

Trump Jr. and Eric TrumpEric TrumpFlorida city bans gambling amid prospects of Trump-owned casino Lara Trump on Senate bid: 'No for now, not no forever' Lara Trump disputes report that father-in-law is discussing reinstalment MORE have taken lead of the Trump Organization since their father won the 2016 election. 

Trump used the Monday night rally to continue his push for a wall at the U.S.-Mexico border. 

He alleged that El Paso became safer since the city built a border wall, though Mayor Dee Margo (R) has refuted those claims.

Former Rep. Beto O’Rourke (D-Texas), a potential 2020 candidate, held a rally in El Paso at the same time as Trump's, pushing back on many of Trump's claims regarding immigration and border security.