Mick

No they don't or can't.

It's not down to the 'American' public to activate it or invoke it. 25th Amendment actually covers succession to Presidency, in the event of inability due to incapacity, or death of the current sitting President.

The founding principles, is that in the event of one Chief Executive being incapacitated or dying while in office, that the U.S will always have a 'Chief Executive' and will respond if attacked or provoked.

Firstly, for the 25th Amendment to be invoked, it requires the President himself to declare his unfitness to serve the office and if he cannot do so because of his incapacity or unwillingness to so do, then it then involves the Vice President getting the agreement of the rest of the Trump Administration that the President is unfit to serve and make a written declaration to the Speaker of the House, and then it boils down to a two thirds vote, in both houses, this is hardly likely to happen.

There is no mechanism in the Constitution that covers a President being easily removed from office, especially if they have not committed a crime and that is on purpose, or else such clauses would be invoked and abused so easily, just because someone or some entity does not like what a President says or does.

Both Impeachment and 25th Amendment, are complex processes and both still require two thirds of both houses to remove a President from office.

I saw something so ridiculous yesterday, being said in a post on social media, some dude saying that Obama needs to become President again, while Trump is being investigated. Very important to note that Trump is not under FBI investigation for the Russian collusion story, Comey confirmed that when Testifying in June. Special Counsel Robert Mueller, maybe looking at Trump trying to obstruct justice, by firing Comey, we don't know, it's not been confirmed. But as for Obama becoming President again, even acting President, this is a no no. A former President cannot serve more than two terms.