Consider two facts:
- Anyone who ordered this or carried it out would be committing treason, and I know that word is typically misused.
- The Trump administration is astonishingly leaky. Everyone is ratting out everyone else on a daily basis.
Based on the above, I don't think anyone has the guts for a false flag operation. It is almost literally a suicide mission.
Another thing to consider is that an attack would not necessarily help Trump. On 9/11, Bush could argue that the country was unprepared. But today, a successful attack would be a sign of incompetence. You would immediately hear questions like "Obama kept us safe, so why couldn't Trump?" There would be criticism of his attitude towards intelligence agencies, the NSA, etc. The CIA would likely chime in with "We tried to warn him..."