Complex sentence: The Commonwealth Constitution did not allow for Federal electorates to cross state borders and national governments shieded away from a hypothetical impasse where a thousand Territory voters might some day hold the balance of power in an evenly divided Commonwealth Parliament.
Split into simpler sentences: The Commonwealth Constitution did not allow for Federal electorates to cross state borders. This enabled national governments to shy away from a hypothetical impasse where a thousand Territory voters might some day hold the balance of power in an evenly divided Commonwealth Parliament.