Okay, I agree that there are some who are in denial, or incapable of understanding the information out there.  But for the most part, the evidence is there and it is certain. US intelligence agencies all are in agreement that Russia hacked the election with the sole purpose of helping Trump get elected. People who can read understand that as fact. 
Republican Congressmen also agree. 
The only thing in doubt is how much Russian hackers influenced the election since that is impossible to quantify. 
So my claim stands. Most Trump supporters know, but don't care.