Resolved: We need a constitutional amendment to mandate non-partisan redistricting committees for a

To make regulations regarding the “Manner of holding elections” doesn’t seem to me to allow redistricting by Congress without twisting those words beyond comprehension.

As per Wikipedia (Article One of the United States Constitution - Wikipedia):

Very good cite. I admit my error.

[California’s redistricting success in jeopardy?

A Supreme Court case challenges independent panels that set legislative boundaries.](California's redistricting success in jeopardy? - POLITICO)

Let’s just get rid of districts and do proportional representation. No waste votes.

If it helps the discussion, the independent Boundary Commission is composed of lawyers, former professional civil servants and expert advisors on the more nebulous geographic criteria set by law (such as, to quote from their website “local ties, geographical features, and minimising change from existing constituency boundaries”). Then there’s a whole process of consultation, in which local people get to have their say - and of course the party organisations will dress up their arguments in terms of whether people in one part of proposed constituency really have much to do with people in another part (that just happens to vote differently), or whether they usually shop and travel to work in some other part, and suchlike considerations. But the final recommendations

Constituencies also have to fit within existing local government boundaries, and any time those are reformed there is usually an almighty row: I seem to remember that one of the many reasons for Scottish disengagement with London was that, before devolution and the Scottish Parliament, the then government in London pushed through a local government reform that was thought to be unduly partial in their favour in its effects.

Final recommendations have to be approved by Parliamentary Order, but if there were seen to be direct partisan “fiddling” it would be noted in the electoral campaigning balance. It’s widely held that the present boundaries favour the opposition unduly because of population shifts, but the last five-yearly review was not set in motion as a result of inter-party disagreements within the government.