Based on which policy though?
70% of Americans support Medicare-for-All
60% of Americans support free college tuition
75% of Americans support the Green New Deal
67% of Americans support raising the minimum wage to $15
74% of Americans support a 2% wealth tax
I could go on like this for a while. There is OVERWHELMING support in America for the entire progressive platform. When it actually comes down to policies, Americans support them. You saw Bernie Sanders go into a Fox News town hall or a Joe Rogan interview and win people over easily with simply policy statements.
The problem is that the rich control the Republican Party, the rich control the Democratic Party, the rich control the media, the rich control the lobbyists, and the rich control campaign funding. So every single race builds around a concerted effort by both parties and everyone with control over the message to fukk up the messaging and worduse and make progressives look like extremists. The ones in the power positions for the most part know what they're doing, then they get their messages repeated through useful idiots like Napolean and the Twitter brigade who may or may not know what they're doing but "trust" the people in power because "they're the good guys", and then regular citizens believe that messaging because it's all they're hearing and they don't know any better. And it's really, really hard to break through that shyt.