Considering what the support base of Trump Nation is like, I stand by my original observation that Ford Nation is still the most multi-racial/ethnic coalition yet I've ever seen or heard of that's considered to be on the right. Though Ford said racially charged things, nonetheless, working class visible minorities still stood by him, which is far, far more than can be said for Trump.
On the left, however there were many attempts historically to try to make coalitions of those who were disadvantaged or marginalized by either, or both, race and class lines (for example, the Chicago-based Rainbow Coalition associated with Jesse Jackson), but these coalitions have not really held up well. Bernie Sanders' campaign couldn't really make a coalition between working class whites and working class minorities despite somewhat of a push to attract the support of the latter later in the game.