It's been called the Gulf of Mexico everywhere for centuries. The president is free to attempt to rename it but that will only be successful if usage follows. Which it does not, as of today. This is a terrible example of subjectivity.

Russia doesn't care what you call that sea, they're interested in actual falsehoods. Like redefining who started the Ukraine war, making the US president antagonize Europe to weaken the West, helping far right parties accross the West since they are all subordinated to Russia...