Yeah, that’s fair - ‘new’ is probably not wholly accurate.

I think that immunity for explicitly delineated powers makes sense purely from a logical point of view: the constitution says the president can do a thing, therefore a law saying they can’t do that thing is either unconstitutional, or doesn’t apply to the president.

You are effectively implying this, but I will say it explicitly - you don’t need immunity to reconcile the logical conflict. The courts can simply find that that law is unconstitutional facially (if it is specifically directed at an enumerated executive power) or as-applied (if it is a general law that sweeps in executive conduct that falls under an enumerated power). In other words, it’s not that the President is immune from criminal prosecution for violating a criminal statute, but instead Congress violated the separation of powers when passing the law and it therefore can’t be enforced because it is unconstitutional. In that situation, this would be a defense to the prosecution, with the burden being on the President to raise and prove the unconstitutionality of the law just like any other defendant. We don’t need to invent a new immunity to protect the President against Legislative excesses.

The doctor at issue (Ronny Jackson) was the White House doctor while Trump was President. His office was in the White House. He travelled on Air Force one with Trump.

He was the doctor that gave an hour long press conference at the White House on Trump’s “excellent” health, saying Trump has “incredible genes.”

Trump then nominated him to head the VA, although he ended up withdrawing.  At that point Trump created a brand new position in the White House for him - Chief Medical Advisor to the President.

After he left the White House, Jackson became a US representative and has been one of Trump’s main supporters. Trump endorsed him when he ran. Jackson was just at Trump’s hush money trial with the other Texas republicans to provide him support.

This is not some random doctor Trump saw once for a physical.

https://www.cbsnews.com/news/veterans-affairs-pick-ronny-jackson-impressed-trump-after-he-gave-glowing-health-report/

https://abc7amarillo.com/news/local/congressman-ronny-jackson-among-texas-republicans-at-trumps-side-as-defense-rests-in-hush-money-trial

https://en.m.wikipedia.org/wiki/Ronny_Jackson

It seems the confusion is that you think whatever the total amount the item sells for is a “gain.” A gain is the profit - the difference between what you sell the asset for and your cost basis in the asset.

In your car example, the cost basis is 50000. If you then sell it for 10000, you then have a capital loss of 40000. You don’t pay taxes on the 10000 because it is not earned income and it is not a gain - it’s part of your original capital. And you obviously don’t pay taxes on the 40k loss. And since it is a car, you can’t even deduct the loss.

If you sell the car for 55000, then you have a gain of 5000 (the difference between your cost basis of 50000 and what you sold it for). You are taxed on the capital gain of 5000, not on the entire 55000.

Your explanation is wrong.

Here is an explanation of capital gains directly from the IRS:

https://www.irs.gov/taxtopics/tc409

You need to read more about how capital gain taxes work.

In your car example there would be a capital loss, so no taxes would be owed.

If you sold it for 55000, then there would be a capital gain and you would owe tax on the 5000 profit.

Here is an article that explains it relative to your example:

https://www.dmv.org/articles/income-tax-implications-of-selling-a-used-car/