A large majority of the country is for making marijuana legal at the federal level. Most people don't like corporations and billionaires funding our elections. Most people are against gerrymandering. Most people are for legal immigration. Most people agree that out healthcare system is broken and way too expensive. Most people want education to be affordable and effective. Most people care about the environment. Most people don't want people to be jailed for petty things or people wrongly convicted.
The things people disagree on are the way these issues are framed by politicians and the powerful and the proposed solutions. However it's easy to agree that all of these things are a problem. I'm not saying everyone agrees but a lot more people agree on things then you are lead to believe by those who benefit from keeping the country divided.