You know, the people who want to destroy the EPA, the Dept. of Education, and the IRS.
The same people who want to repeal the ACA, Roe v. Wade, and the Voting Rights Act.
The same people holding back federal laws on LGBT rights, fair wages, drug sentencing; cutting funding for medial research, public transport, veterans' health... name it.
You mention "Free trade, fracking, keystone, regime change" -- Clinton and Sanders are so close on these, especially compared with the differences between them and Republicans, it's minuscule.
We're looking at the possibility of Donald Trump making USSC nominations, and these differences are enough for you to sink the whole ship?