The EO allows him to go after anyone who has helped with foreign interference / intrusion into the elections.
The Insurrection Act says the President has the power to go apesh!t at any government entity who denies Constitutional rights...say, hypothetically, cities / states who deny their citizens a Republican form of government (Republican vs. monarchy or dictatorship or oligarchy, that is, not GOP vs. Donkey)...which would included totally fraudulent elections.
Thanks to you both. I now have more reading to do. Trying to get two family members off the ledge, metaphorically speaking.