WHY SO MILD?

I hear TV pundits wonder about how mildly Trump, full of vituperation for his enemies, treats Nancy Pelosi,  Now to the slightly warped mind of the Pitcher in the Wry, this should be expected from the cunning Trump.  After all, he thinks that if he is impeached so to will Pence.  Who then could be the President who could pardon Trump for his transgressions?  To Trump, Nancy could be his final fall back if all else fails.  He is reluctant to insult Madame President.