What happens next in Trump's impeachment?

President Donald Trump entered the history books in a new category Wednesday: He is the third president in U.S. history to have been impeached by the House of Representatives. The two votes on impeachment bring to an end the House's months-long inquiry into whether Trump improperly pressured Ukraine to conduct investigations that would benefit him politically.
Here's how we got to this moment, and what you can expect in the Senate trial that comes next.
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What happened Wednesday?
The House s