GOP will continue to lose until they start keeping the promises made in 2016.
When candidate Trump first proposed tax reform, he touted $25,000 single/$50,000 married standard deductions, his lowest tax rate remained at 10% [while the income bracket for that 10% greatly increased] and a 15% business tax rate. That was when I first paid attention to the possibility that Trump's "tax reform" might be a good thing.
But that was only the BAIT and it has long since bit the dust.
Now we have the GOP SWITCH, a Frankenstein tax monster that hurts many poor and middle-class taxpayers and will destroy its own GOP creators.