The Constitution does not permit amendments to change the "equal" representation of states in the Senate, but we can even the playing field by making it easy for large states to subdivide for the benefit of the people.
Or did you perhaps have some gerrymandering-esque idea to limit these 'benefits' to liberal metropolitan areas?
What? It sounds like you're crowing over some kind of "gotcha", but what is it?
If we both agree on the same principle, what's the problem? Namely, that citizens being disproportionately (un)represented in their "democratic" government is typically bad, and especially when it's just from ancient quirks of boundary line development.
On reflection, I suppose there's another explanation: Some people go through life with no real principles, flip-flopping based on whatever is temporarily advantageous to "their team". Is that it? Are you projecting your lifestyle onto me, and feeling the thrill of "winning" at being badder?
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In either case, more legislative details are in this older comment: https://news.ycombinator.com/item?id=45690336
If you split California into 10 states, most will be red.
Why do you assume the split should be fair? The rural areas can be one state, each city can be a separate one.
That would fly, right?
Imagine a big swing-state split between Yellow and Purple parties. It's legislature is controlled by Yellow, and they pull a sneaky: They partition into 10x Small Yellow states (5% pop each) and one Big Purple state (50% pop) Let's also assume the whole effort somehow evaded requirements in the state's constitution, referendums, etc.
At first glance, you might think Yellow has "won" by adding more/safer seats on the federal level, right?
Except now the folks in Big Purple are kinda pissed, and they control themselves now. They could choose to split again, leaving things as 10x Small Yellow and 10x Small Blue. That puts the partisan balance is back at square one, except for a shit-ton of disruption and pain and a bunch of Yellow politicians are out of a job. So did they really win? Knowing the likely outcome, would they have tried anyway?
In short, it's very different from district gerrymandering. For starters, every division becomes independent, and it won't even happen if residents are asking tough questions like "Then how do I get my water from the river!?" It'll be a very slow and very deliberate process stretched across multiple election cycles.