Gambian security forces seized the country's Independent Electoral Commission on Tuesday, drawing international condemnation in the context of a contested presidential election held on December 1.
President Yahya Jammeh, who initially conceded defeat, has now lodged a Supreme Court case to challenge the result.
A diplomatic source told AFP there were "serious concerns about this visit given the situation in Banjul, especially after the takeover of the election commission's office."
Badjie has flip-flopped over his loyalty to Jammeh or Barrow.
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Barrow, who should be inaugurated in January, claimed Badjie had personally assured him of his support, but the general then appeared on Tuesday at high-level mediation talks in Banjul wearing a badge with Jammeh's face on it and saying the incumbent was his boss.
Today the European Union described the IEC occupation as "unacceptable", adding it "violates the principle of independence of the IEC."
Meanwhile Human Rights Watch has said it is "crucial that (security forces) act in a politically neutral and professional manner".