Marianne Williamson endorses Sanders at Texas rally

Former 2020 candidate and author Marianne WilliamsonMarianne WilliamsonThe Hill's Campaign Report: Biden looks to stretch lead in Tuesday contests Pelosi: 'I usually always cast my vote for a woman' Pelosi: 'We'll have a woman president' someday MORE endorsed Sen. Bernie SandersBernie SandersBiden campaign: Trump and former vice president will have phone call about coronavirus Judge slams Wisconsin governor, lawmakers for not delaying election amid coronavirus outbreak The Hill's Campaign Report: Biden offers to talk coronavirus response with Trump MORE (I-Vt.) for the Democratic nomination on Sunday at his rally in Austin, Texas.

In a surprise appearance at the rally, Williamson told attendees that Sanders's strong performance a day earlier in the Nevada caucuses made it clear that the energy in the 2020 cycle was "unquestionably" with his campaign.

"What happened in Nevada on Saturday was extraordinary, and the energy is unquestionably with Bernie," Williamson said in a statement released through Twitter.

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"I am honored to endorse him," she added.

Her endorsement comes a day after Sanders's dominant victory in the Nevada caucuses. He won more than 40 percent of the overall vote, while his closest competitors failed to break 20 percent. The contest marks the third in a row in which Sanders has won the popular vote.

The Vermont senator has focused his efforts in recent days on Super Tuesday states and South Carolina, where former Vice President Joe BidenJoe BidenBiden campaign: Trump and former vice president will have phone call about coronavirus Overnight Health Care: Trump resists pressure for nationwide stay-at-home order | Trump open to speaking to Biden about virus response | Fauci gets security detail | Outbreak creates emergency in nursing homes 16 things to know today about coronavirus outbreak MORE remains on top in some polling.

Williamson previously appeared at several Democratic debates during the 2020 cycle before dropping out in the days leading up to the Iowa caucuses.