Gov. Greg Abbott (R-TX) called President Joe Biden an "abject failure" for his handling of the southern border during his presidency.

Speaking ahead of former President Donald Trump at the South Texas International Airport on Sunday, Abbott decried the Biden administration's immigration policy.

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"A president has one ultimate responsibility, and that's national security," Abbott said. "Joe Biden has failed at national security. Well, I'm here to tell you that there is no way, no way that America can continue under the leadership of Joe Biden as our president."

His condemnation of Biden carried into praise for Trump, where he issued his official endorsement of the former president.

"We need a president who's going to secure the border," Abbott said. "We need a president who's going to restore law and order in the United States of America, not letting these criminals run ransack over the stores that you see images of almost nightly; we need a president who's going to restore world peace as opposed to this outbreak of warfare under Joe Biden. We need Donald J. Trump back as our president of the United States of America."

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"I'm here today to officially proclaim my endorsement for Donald J. Trump to be president of the United States of America again," he added to rapturous applause.

Abbott also claimed that the equivalent of four Manhattans or three Chicagos have crossed the border during Biden's presidency.