Terrence Bradley, an Atlanta-area lawyer, had been billed as the star witness in the effort to disqualify Fani Willis, the district attorney leading the election interference case against former President Donald Trump in Georgia. But when Bradley took the stand this week — and twice earlier this month — he was a deeply reluctant witness. His testimony did little to resolve a question at the heart of the defense’s attempt to show that Willis had an untenable conflict of interest: whether the roma