It doesn't matter which party controls the White House -- conflicts of interest have no place in the federal government.
Unfortunately, those haven't disappeared in this administration, and as Steve Hilton over at The Next Revolution points out, Trump's Commerce Secretary Wilbur Ross has used his position to make himself a very rich man.
This kind of thing happens all the time, and most people feel powerless to do anything about it.
That's why the Founders included the Article V option in the Constitution. Article V allows the states to call a Convention of States that has the authority to propose constitutional amendments that limit the power of the federal government.
Shrinking federal power and jurisdiction would limit the ability of men like Ross to use their position for personal gain.