What should be done if the President is mentally ill?

What should be done about a mentally ill president depends on the complete situation.

In the current case we have to recognize that this was known when he was nominated and was almost certainly part of the power-brokers considerations, leading us to recognize that the 25th Amendment was always part of their plan. He was chosen on the premise that he would resign when told, and that if he chose not to resign on cue, he could easily be removed.

Clearly there were competing forces involved, because he was provided with a Veep chosen to be an "insurance policy" against the 25th Amendment.

All anyone can do about the senile president is to do everything possible to support his illness in the hope that he can make it at least until late January 2023 while doing a minimum of harm.

There Were Several Articles On Line, But It Appears That Not Much Can Be Done When We Have A Mentally Ill President.
But Here's Just One Item I Found Which Is HILARIOUS !!

What happens if the president becomes mentally unfit ... - Quora
http://www.quora.com/What-happens-if-the-president...
In the case of President Trump, he went into office mentally unfit. On inauguration day, he demonstrated his unfitness by having Spicer say that his inauguration crowd was the largest ever, period. That was just the beginning of Trump’s lunatic lies and exaggerations, many just gratuitous.

Regardless of what others think about Trump, I respect him as my president and they should too. Any who served and are currently serving shouldn’t bash your president. Citizens shouldn’t do it either. Whether you like it or not, with all due respect, ma’am, he is still your president.

Put him in the oval office with his toys he'll get over the President thing.
But not the Red Button

That is conduct unbecoming an officer to question the mental stability of your Commander in Chief with no proof other than the opinions and rhetoric of the opposing political party. Keep your political bias to yourself while serving. You volunteered and are getting something for your service or you wouldn't be there. I swore an oath to protect the constitution from enemies both foreign and Domestic. I took that oath seriously.

the democrats think he is crazy the same ones who wear VJJ outfits and gays who march 90% nude and the communist and islam.

If that is verified as true, there's always the 25th Amendment.

They can’t handle President Trump ! So they come off and say he’s mentally unstable.. he doesn’t follow what’s on the manifest they want for him to run the country by...

Read the constitution all your answers may be found there.

Don't believe the press or the liberals who truly want the President to fail since they lost the last election. Believe me, should the president be mentally ill he would be removed and the Vice President would take his place. The President has done things which piss off those who are afraid of what THIS president might discover and pass on to you the voter. There are some criminal investigations going on. Should there be any traction behind them or crimes committed, the people who have run things for so long could be stripped of power and go to prison. If I were them, I'd be doing all I could to detour anything I COULD ON THIS PRESIDENT. He has discovered quite a bit and was taunted for it, until it was found out he had actually uncovered several criminal things. Don't trust the media to help you find the truth. You have to dig for it yourself these days. Good hunting.