I think the US House has a very interesting set of circumstances. Obviously, AG Barr is breaking federal law. He is doing so because he has enormous power and he practices obstruction with that power. In any actions by the US House that requires cooperation of the Attorney General’s OFFICE and that cooperation is refused it is time to file a lawsuit with the US Supreme Court to uphold the US Constitution and assign an independent prosecutor.
In regard to impeachment of Barr or otherwise the US House needs to have a dialogue with their constituents to know how the people see it. Town Halls, local news interviews and newsletters will be clear attempts to solicit opinion as well as educate. Door to door canvassing can be a sincere initiative to bring the American people into the decision circle.
If the US House goes forward with any impeachment, the arguments have to be compelling to the people so they can bring pressure to uphold the impeachment. If McConnell practices politics rather than upholding constitutional law, McConnell will need an ethics review and censure carried out. Once the ethics investigation proves corruption and censure is levied, it then enters into political reality for the people to realize the extent Republicans scoff at the US Constitution.
Additionally, any professional organizations that governs it’s licenses and otherwise should receive all the facts. There was a time when Former President Clinton faced a suspension of his license.
This is a time for finding the authority where it exists with such a corrupt White House. I refuse to believe obstructing will prevail.