Kamala wants to raise taxes on rich and reduce taxes on middle class, which should benefit middle class.
Trump wants to reduce taxes on the rich while taxing middle class more by indirect means (tarrifs, money printing).
Sure, one could say that Trump's "trickle down economics" might indirectly have some benefits for middle, lower class.
But there is one crucial thing missing in both candidates. Neither wants to reduce spending. Both increase it.
This is very important because there is no actual way to fix economy if government spending keeps rising.
Every dollar in government budget is taken from US citizens and used mostly in much less effective way.