To put it another way, as a SBO, I've found that conflict is inevitable between myself and customers/employees. It's just going to happen. However, if you avoid making it personal, you can settle the issue and move forward with no lingering hard feelings. I'm sure the POTUS knows this. So, rather than make it sound like he's ready to fight with Congress, he could have said something along the lines of "As the POTUS, it is my duty to do what I think is best for America and it's citizens." No need to bring up Congress and the conflict he knows is coming(and has been there since Day 1). Just state your objective.