Considering how land has more political power than people in the US, the voting system is still a major issue.

If we had the National Popular Vote for US elections, then more people living in deep blue states would have more reason to show up to vote when their candidate already is going to win by well over double digit points in their state.

When low population states are overrepresented in Senate and Presidential elections, then we can end up in a ruled by the minority situation.