>>5222350 lb
Ask simple questions. The best thing to do is to get her to re-evaluate President Trump by asking when she developed her opinions or what statements, specifically, led her to believe he held x, y, or z attribute.
You can try to attack it with his achievements, but this is probably something to pass along only if she begins questioning what she knows.
It is often easier to get a person to consider things when you are presenting it not as "you are wrong" or "you do not know" but, instead, "are you sure there isn't more to the story" or "I see how things can look that way."
People do not like to be made to feel incompetent. They are often not incompetent, they are simply trusting the wrong sources.