By asking the questions, Democrats took away the unknown. They took away the, “Well, the DOJ and Trump are keeping us from knowing what Mueller really knows, and you have to elect us to keep this bad orange man from literally destroying the world!†narrative. The entire country has now seen that it’s a politically-driven nothingburger.
To be sure, since the Democrats now control the House they had to do something to force Mueller to testify. The Squad and the Justice Democrats wing of the party forced that course of action. Now, they essentially must press forward on impeachment since the Mueller Report punted to Congress. If they don’t press forward on impeachment, they’re essentially admitting they know that everything they’ve said for the past two and a half years is bulls**t. With a number of Dems in swing districts unable to vote for impeachment, even that will likely fail, and will only make the shriekers look even more unhinged.
https://www.redstate.com/jenvanlaar/2019/07/24/muellers-testimony-dems-blew-2020-juice/