Now, what should I do?
There are many people in this building that can be used as hostages. And this is a building where they gather people who is governing this country. If any of the people here die, there will be backlash.
Sigh... it will be much easier if this is a kingdom. As long as the king is alive, the kingdom will still have people who obey him. Whether by choice or forced to do it.
But this is not a kingdom. The president will change after a few years, and everyone in this building is important for the future of the country. Well, that's the same as kingdom. But at least if the king is still alive, everything can be fixed by him.
Although this country is being lead by a president, she's not alone in governing this country. They need majority vote to decide what to do. Unlike a king that can change everything to his will.