1)
What did he speak to the nation?
1.
Radak: This Nevu'ah that came to him. Malbim - he said it beforehand to show the Emes of his Nevu'ah, that he knew that his wife will die.
2)
Why does it mention morning?
1.
Radak: This was the time of Aveilus (Malbim - the time of burial), and I did opposite to other Avelim.
3)
What is "Ka'asher Tzuveisi"?
1.
Rashi: I did not conduct Aveilus.