Anyone sensible would have been on the phone immediately to seek the deployment of the national guard. But I don't think that Trump thinks that way.
I don't actually think he intended to lead an insurrection. I think he pushed a snow ball and it quickly went completely out of his control. He wanted a big and loud protest. He couldn't understand why Pence was going to certify the election result when Pence was his VP. I think that is because Trump as a political outsider, tribalist, and transaction-orientated person could not understand the process.
I think when the Secret Service refused his command to take him to Capitol Hill they saved him not just from violence, from being physically present as the rioters smashed their way into the building. It would have been beyond doubt at that stage that he was leading an insurrection.
