Dear Always,
It is called overthrowing the government. Same as what happens go the Far East, Africa, and Latin America.
Three differences from a classic coup are: 1. Some of the conspirators, including key figures, asked for pardons or planned a judicial defense in advance of the attempt. 2. Nobody thought of what to do if Pence etc. wouldn’t go along with their plans. 3. There was no safeguards to prevent things from going me the rails. A successful coup needs some discipline.
What does it show? That even when it comes to holding on to power, people without personal virtue will not think enough of themselves to do what actually works. Always looking for it to be handed to them.