The most powerful position as politicians is President. But the most powerful committee is in Congress. And since we are not a kingdom governed by kings. We have to admire our present leader when he loudly thinks he can pardon himself.
If we can impeach without any president stopping the procedure. Then mostly this I can pardon myself is within the same league. Without measure because the forefathers laid out plans accordingly.
Next, we would have crooks in leadership trying the same procedures. But if innocent, as he states, then why worry about any pardon?