Venezuelan opposition leader and Nobel Peace Prize laureate Maria Corina Machado greets supporters after her arrival in Caracas on Sunday. | AFP-JIJI

Venezuelan opposition leader Maria Corina Machado returned to Caracas in a surprise move that could pose the biggest test yet to acting President Delcy Rodriguez’s political opening and the administration of U.S. President Donald Trump’s strategy for post-Nicolas Maduro Venezuela.

“I’m here, with you,” Machado posted on X on Sunday, confirming her return after months abroad. She gave no details on how she entered Venezuela, but her party shared photos and videos of her arriving at a church in Lara state, where emotional supporters embraced her and said, “She will be the next president of Venezuela.”

Machado’s team thanked Trump and U.S.…