He did attack Trump before Trump went after his Wisc. record.
So what? Trump had every right to respond... honestly and with factual information.
He didn't. Walker had nothing to do with that $2.2 billion budget R-E-Q-U-E-S-T from the agencies. The final product, after his line-item-vetoes produced a surplus. For Trump to call it Walker's deficit was completely false. Once he had been corrected publicly, for him to repeat it was beyond unethical: it was dishonest demagoguery.