The US political system is so, so very broken and honestly needs to be built up from scratch.
Voting should be compulsory.
Voting should be accessible.
The bar for entry to run should be much lower and more accessible to people who want to run and make a change.
Preferential voting should be considered.
The people should have veto power over government if there is a vote of no confidence to allow a dissolution of said government and snap elections held to redistribute power in favour of the people.
And so much more. Like getting rid of gerrymandering, electoral college etc. So that the votes actually reflect what the people want. If the country is mostly progressive, then it moves in a progressive direction.
Etc. Etc.