Tell that to the US DSA which is seeing record membership increases. And tell that to Kamala Harris who's an astute politician that co-signed Sander's single-payer bill. If the winds of change aren't blowing leftward then explain the current trend.
Also, Trump's ascendancy is the result of the capitalists not the working class. Robert Mercer (one of Trump's key supporters) has as much in common with you and me than does a mouse with a moose. Essentially, Trump is the carefully created result of decades of right wing propaganda and concerted destruction of the welfare state. Want to see less of Trump? Then tax the living heck out of the super rich and/or ban their right to fund any kind of think tank or PAC forever (down to a constitution amendment if necessary).