Looking at previous geopolitical rivalries between Donald Trump and some other leaders, there's two different outcomes.
25% chance Trump honors the memory of John McCain with operation Bomb Bomb Bomb ... Bomb Bomb Iran
75% chance Trump becomes best friends with Supreme Leader Khamenei after they meet in neutral territory
If I was Iran I would aim for the latter. That would make a lot more people in the US uncomfortable and would be a bigger victory than blowing up a tanker or military base.