At least 60 migrants were found packed inside the trailer where they were discovered Monday, 46 of them were declared dead on the scene.
White House press secretary Karine Jean-Pierre told reporters Tuesday that President Joe Biden had been briefed on the incident, as he travels to Spain for a NATO summit.
Texas Governor Greg Abbott blamed President Joe Biden for their deaths.
“These deaths are on Biden. They are a result of his deadly open border policies,” Abbott wrote on social media. “They show the deadly consequences of his refusal to enforce the law.”