Have you been asleep the past 4 years? Democrats have been in total control of vast chunks of the Trump executive branch. All the important bits, really. DOJ, DOD, etc.
Yes, the dems have been in control for the last 4 years, just not total control. Otherwise, they would have already removed the senate filibuster rule, packed SCOTUS, put us back in the Paris climate accord and added DC and PR as 2 new states...just a few examples.