Who is "Shofech Buz Al Nedivim"?
Seforno: Hashem, e.g. in Makas Shechin, the witches [could not stand in front of Moshe due to the boils].
Malbim: When no one leads the nation, the poor rise Lavuz and to plunder the Nedivim's money. In countries without a king, the masses often rise to plunder the rich and kill them.
What is the meaning of "u'Mezi'ach Afikim Ripah"?
Rashi: He softens and opens the belt of the strong, to weaken them. This is like "ul'Mezach Tamid Yasgereha." Afikim are strong, like "Afikei Nechushah", "Afikei Maginim."
Malbim: The masses are compared to rivers, that their nature is to overflow and take everything in their path. The nation's leaders are like river banks, a belt to stop the water from leaving its boundary. Now the belt is soft, and does not hold back the flood.
