If you think only one of the two parties of capital are to blame for this timeline, I have a bridge to sell you.
Democrats manufactured consent for Trump's rise in a 1000 ways over decades. Neoliberalism delivered us Trump, who is merely a symptom of this broken system.
Dems/Repubs play good cop/bad cop; always in service to capital interests. We have a uniparty, but people are fooled by reasonable election turnout and close elections. Democracy is an illusion in the US.