Who were the Zekenim in front of him?
Malbim: They were the Zekenim. They were joining the nation. He was not in the Beis Midrash with his Talmidim.
Who sent whom?
Rashi: The king sent a Shali'ach to kill Elisha.
Malbim: Elisha sent away everyone in front of him, except for the Zekenim. He did not want commoners to know what will happen.
What is the meaning of "b'Terem Yavo ha'Mal'ach"?
Radak: It is as if it says uv'Terem; and before he came
How did Elisha know about the Shelichus?
Radak: He knew through Nevu'ah.
Why did he call him "Bem ha'Meratze'ach"?
Radak: He is the son of Achav, who killed Navos. His son (Yehoram) wants to kill me!
Why did he tell them to press the Shali'ach against the door?
Malbim: The king may not kill people without Mishpat. We find that Achav needed a reason to kill Navos! Therefore, you can protest against him.
Could they hear Yehoram's footsteps?
Radak: Listen, and you will hear (he will come after his Shali'ach).
Malbim: Do not fear that he comes with many troops. You can hear his footsteps (no one else is with him).