The guy has made ~3500 stock trades in the last 3 months, and there's a pattern of him publicly pumping stock by mentioning a company in a tweet or public statement.
The problem is, the framers of the Constitution believed the American people would never elect someone so criminal and unfit, so the President is exempt from many criminal laws, including those that would stop this.
The framers of the Constitution were looking at a different world, where there was not the instant communication and sense of one "America" that we have. They figured that, while attempts at corruption were inevitable, the different states would protect themselves by not allowing representatives from another state to succeed at any self-serving corruption. But the rise of national party instead of state as primary political identity (which Washington warned about), and the huge propaganda pipe that is the internet, have destroyed the (supposed) protection of many individual state identities.
They may not have been able to foresee the sheer levels of corruption we have today, but they should have been able to see that in trying to keep Congress from becoming too powerful, they made it too weak to do its job. The fact that Congress has hundreds of members, plus the veto in the executive branch, plus the Supreme Court being able to overturn legislation, was plenty to keep it in line.
It was inevitable that the executive branch would end up taking over a lot of their functions.
Of course that made a lot more sense in the 18th century than it does in the 21st, we tend to view states that routinely engage in violent coups as failures, and the man who famously said of Shay's Rebellion that "the tree of liberty must from time to time be refreshed with the blood of tyrants and patriots" ran from Monticello like a coward when the British showed up and left its defense to his slaves.
But the last line of defense is supposed to be "we just kill them all." What the founders didn't anticipate was that the militias would side with the tyrants, or that society and its morals would advance to the point where political violence was no longer seen as a noble act except by extremists.
Nixon resigned when he was told that he would likely be impeached. Unfortunately the current Republicans in Congress are completely spineless.
“Checks and balances.”
More like cheques and (bank) balances.
That kind of says the opposite - for the vast majority of individuals, incentives matter more than their innate convictions (and we're losing those at a fast rate, thanks to modern education and entertainment...)