Errr if the democrats do republican policies, why you need republicans? The republican policies they are already in place.
With that atitude you show that US is republican and not only that. If democrats do republican policies (bizarre), besides doing already the republicans job, the R will double down and will do worse policies that will not look that bad or shocking because the D already did R policies and then you have the likes like trump, boebart, MGT normalized and moving all the spectrum to the right, nornalizibg far right as right and right as left
If you are D you do your policies, not Rs