Who or what are you defining at "working families?" Politicians like to throw around this phrase, but a lot of times they mean the middle class and not the working class.
But let's see. Which party is trying to make sure that all people have access to healthcare, regardless of income? Which party does not vote to limit social safety net programs? Which party supports unions, which have been proven to improve the income of workers in an area even if they are not union members themselves?
Or, you know, let's take into consideration these maps and compare to recent party control:
Here's a map of the states with the most food insecurity, and surprise surprise, it's those that have less robust social safety nets.
Or even just play with this
State of the States (especially the overall well-being map). It's not as directly obvious, but people in the mountain states do have a pretty awesome place to live that might make up for some other shortfallings.
Of course, there are many other measures that one can take into consideration. But in my experience and observation, social safety nets are the most important thing for protecting the actual working class, and Democrats are currently the party defending those nets, while Republicans are trying to cut holes in them, which lets more people fall through and get eaten up by addiction, debt, and hopelessness.
Also this:
Yes, clearly the party that advocates for ending mandatory minimum sentencing, increased minimum wage, ending workplace harassment and hiring discrimination, strengthened workplace safety standards, and increased worker presence in corporate shareholder pools has forgotten about the working man.