Seeking new elections, María Corina Machado will need to tread carefully to avoid offending the Trump administration, while also asserting her own leadership.

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Blocked from entering her country, Venezuela’s opposition leader spoke with The Times about her efforts to return and her relationship with the Trump administration.

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After nearly 10 months in exile, Ms. Machado, a Nobel laureate, came back to challenge leaders who have sidelined her and press for new elections.

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