Maybe it's because Trump was successful in a highly regulated industry, such as construction.
You have to tell the truth to get all the permits and inspections that are required to begin major construction projects.
As CEO, it's probably his nature to tell the truth, because the business consequences are so devastating. This is the opposite of politics, where the truth is what is often devastating.
-PJ
“This is the opposite of politics, where the truth is what is often devastating”..........
If you are a bad liar, you will NEVER make it in politics. I do not see Trump as a ‘politician”.