“The electoral ballots have been compromised, Congress is in disarray with its leadership killed. I’m staying in office for the duration of this emergency, and the states will decide on a process to select new electors, or the House of Representatives will elect the next president per its Constitutional authority.”
To be fair it’s not like the mob was that determined and capable to actually murder Pence etc. (at least there weren’t any clear signs of it). They scattered immediately after the first guns were fired (I mean those close enough to witness it). So more people might have died but it would have primarily been the rioters rather than anyone else..