Behold, here is the king that you have chosen, that you have requested, now God has given you a king. Focusing on the space between choosing and requesting, Malbim develops the idea of how we interacted with God to establish our first king. On the one hand God fulfilled our request for a monarchy, but on the other hand, the actual monarch He chose for us. The same is true for so much else in life, we are free to request and strive for anything we want but the actual outcome is left to God to regulate.