Actually a really nice question, lets me think of how to make things better rather than just complain.
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Implement ranked choice voting across all elections. Undo all gerrymanders and make intentional gerrymander a criminal offense not protected by legislative immunity
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Pass immediate media/content law package, including laws limiting media ownership, limiting social media reinforcement algorithms, deep & persistent AI content watermarking and anti-disinformation rules, anti-propaganda laws, and content labeling for entertainment/opinion versus news programming.
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Pass public option healthcare of some type and set hard limits on our of pocket yearly healthcare expenses for private insurance at livable levels.
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Pass wealth and profit reform laws to set a CEO-to-lowest-paid-employee distribution ratio for all profit beyond $1m yearly net profit, and tax rates and wealth caps to discourage grotesque wealth accumulation (TBD, but let's say if you have more than $1b, most personal income will be taxed or business income redistributed to workers).
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Initiate global democracy reforms with all of the non-authoritarian governments and come up with global steps to counteract right-wing propaganda (primarily from Putin), revitalize democracy, and reverse the negative effects of globalization on the public to legitimately answer authoritarian populism.
Bonus:
Government reset: Publicly and immediately prosecute the law-breaking currently happening and reestablish rule of law, undo basically every action of Trump.
Reform immigration and law enforcement: cut DHS and ICE to the bone and rebuild into an immigration support system. De-militarize local and state law enforcement and retrain every single cop to actually serve and protect. Support with laws requiring mandatory reporting of police brutality or law-breaking, with criminal penalties for failing to do so.
Anti-enshittification laws: Saas business models heavily regulated, laws that limit companies' ability to data mine and exploit, laws that grant personal ownership of attention (i.e., your attention is not a public resource companies can freely mine with ads), stronger monopoly enforcement to prevent thr terminal stages of enshittified platforms, require giving users the option of staying on prior software and T&C versions.
Worker protection laws: Codify union rights into new laws and incentives for unionization, with anti-corruption package to reduce chance of capture.
Reform Congress to re-establish proportional representation. (Too much here. BMaybe go unicameral, expand house, expand Senate - all constitutional amendments but hey, why not.)
Easy-peezy.