Primary results tonight show that Michigan is going to be very close in a Clinton vs. TRUMP general. We can safely say that TRUMP will pick up Bernie's working class whites.
No, you can't say that safely, at least yet.
I expect Hillary Clinton to do everything possible to solidify the working-class white votes that Sanders got that Obama could not. She needs a coalition for victory, and she will need those Sanders voters to win election, flip the Senate, and maybe even flip the House.
Obama did horribly among working-class white voters, especially in the South. Maybe that's because he is... well, you know.