Okay.
I ask the same question: HOW?
"We" can't pass any major legislation without Republican support... Unless, you know, millennials actually understood how the fucking government worked and voted in more Democrats. Instead of blaming them for not passing the legislation that millennials actually want, but are too lazy to vote for.
Anecdotal, I know... But I worked with a hardcore Sanders supporter prior to the 2016 election. She talked about him non-stop, watched all the rallies, phonebanked for him and canvassed... When I asked her how any of his ideas would actually become law she literally had no idea. She didn't know how a bill became law, she just thought that the President could do all of that stuff by him/herself.
I don't know how common that scenario is, but it seems a lot of people just don't understand how the government functionally works.