When President Clinton was impeached but not removed, the U.S. House of Representatives sent impeachment documents to the U.S. Senate with exact U.S. Federal codes (statutes/laws) that were violated.
When the U.S. House sent impeachment documents to the U.S. Senate, the documents contained no specific U.S. Federal code violations they just contained allegations.
The U.S. system of justice is supposed to be innocent until proven guilty. It was the U.S. House of Representatives job to act like a grand jury to determine which laws were violated (after all they are law makers) and determine if there is reasonable proof from an investigation to proceed to a trial in the U.S. Senate.
Then there is the issue of the U.S. Constitution stating high crimes and misdemeanors. Again, the U.S. House impeachment documents contained no specific statutes of high crimes and misdemeanors.

This is a very serious situation before the U.S. Senate. But truthfully to me it seems like a political soap opera.

Have a great weekend!
Steem on,
Mike