Rashi on the Prophets and Writings

regally regal clothing. But our Sages said (Meg. 15a) that divine inspiration enwrapped her, as it is said (I Chron. 12:18): “And a spirit enwrapped Amasai.”

Even to half the kingdom A thing that is in the middle and at the halfway mark of the kingdom. That is the Temple, which they started to build in the days of Cyrus, and he reneged and commanded to discontinue the work, and Ahasuerus, who succeeded him, also discontinued the work. The simple meaning of the verse is: Even if you request half the kingdom from me, I will give it to you.

let the king and Haman come Our Sages stated many reasons for the matter. What did Esther see (i.e., what motivated her) to invite Haman? In order to make the king and the princes jealous of him, that the king should think that he desired her and kill him, and many other reasons.
to the banquet Heb. (הַמִשְּׁתֶּה) lit. drinking feast. Every banquet is called (מִשְּׁתֶּה) on account of the wine, which is the principal feature.

and tomorrow I will do the king’s bidding that which you requested of me all these days, i.e., to reveal my nationality and my lineage to you.

restrained himself He strengthened himself to control his anger because he was afraid to take revenge without the sanction of the king. וַיִתְאַפַּק is eseretint in Old French, and he controlled himself.

is worth nothing to me I do not care for all the honor that I have.
every time, etc. Our Sages said that he [Mordecai] would show him a deed that he [Haman] had sold himself [to Mordecai] as a slave because he lacked food when Mordecai and Haman were appointed heads of troops in a war.