Senate votes in favor of calling witnesses in Trump impeachment trial

The Senate on Saturday voted to begin the process of calling witnesses as part of the second impeachment trial of Donald Trump.

The Senate can vote by a simple majority to call specific witnesses.

The surprise move throws a wrench into the trial, which was expected to end with a vote on whether to convict the former president by Saturday afternoon. It is unclear how long the process will last or how many witnesses will testify.

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