Legally or not no way is the don going quietly in 2028
A few times this week, he has accused Zalensky of being a dictator, not holding elections etc.
Given that he has shown that a lot of his accusations are confessions and or projections of his own crimes.
I'd say the chances of him 'suspending' the 2028 USA election are relatively high.
scenarios such as an attack on the US military base in Isreal sparking a war with Iran will help his playbook if is going down that route.
What kind of 80yo man seeks to be the head of a country?
What kind of 84yo man would then gladly hand the power back?