IMO, it is very simple. In the House vote, the vote to impeach got ONLY Democrats on the YEA but lost some Democrats to the Nay vote. Very Partisan on the Dems. She is afraid that in the Senate, Trump will NOT ONLY get acquitted but will also have some Democrats voting for the acquittal which will make the acquittal BI-PARTISAN. This will show the world that this was a Political ploy and nothing more.
