WASHINGTON (AP) — Finally playing an active role at President Donald Trump's impeachment trial, senators posed written inquiries that led to pointed, back-and-forth debate Wednesday as Trump's legal team and House Democratic prosecutors pressed their respective cases.

Throughout, the urgent question of whether former national security adviser John Bolton will be allowed to testify remained at the forefront. Democrats argued that Bolton must be allowed to speak to ensure a fair trial, while Republicans said Democrats should have demanded earlier that Bolton and other witnesses testify.

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