I don't how the lower to middle class thinks Trump benefitted them. Has tax cuts help the wealthy:
"These were not the results Republican backers of the tax overhaul promised. Speaking at a rally in 2018 in Indiana shortly after the release of a preliminary tax reform framework in September, President Trump repeatedly stressed that the "largest tax cut in our country's history" will "protect low-income and middle-income households, not the wealthy and well-connected."37
He added the plan is "not good for me, believe me." (That last claim is hard to verify because Trump is the first president or general election candidate since the 1970s not to release his tax returns. The reason he has given for this refusal is an IRS
audit—the IRS responded that "nothing prevents individuals from sharing their own tax information.")
In its finalized form, however, the Tax Cuts and Jobs Act cuts the corporate tax rate, benefiting shareholders, who tend to be higher earners. It only cuts individuals' taxes for a limited period of time. It scales back the alternative minimum tax and
estate tax, as well as reducing the taxes levied on pass-through income (70% of which goes to the highest-earning 1%). It does not close the
carried interest loophole, which benefits professional investors. It scraps the individual mandate, likely driving up premiums and making health insurance unaffordable for millions.
These provisions taken together are likely to
benefit high earners disproportionately and—particularly as a result of scrapping the individual mandate—hurt some working- and middle-class taxpayers."
https://www.investopedia.com/taxes/trumps-tax-reform-plan-explained/