You're talking about Thunderbolt Ross here, yes? From what I can tell, he's never been President in the comics outside of a 4-issue arc in 2022's Hulk, which is set on some alternate Earth.
It's not so much that writers have a specific person in mind when developing a character like this, but they'll certainly have an idea of what type of leader they're looking to portray. To wit, since somebody brought it up earlier, in Wicked, the Wizard was certainly inspired by Hitler and/or Saddam Hussein. So if people are viewing these characters as checking enough boxes to see other certain world leaders as similar, that says something about how the viewers/readers see that leader, not that the character was specifically written to portray that.