His whole speech was a call for bipartisanship and for all workers to unite along class lines. Aside from a tiny bit of pandering to the venue/audience which makes the rightwing audience more receptive to the message, he didn't endorse or praise the Republican party. If you want Republican voters to wake up and vote in their own interest, this is how the message has to go. It's also a great way to sow division within the Republican party.