What Lewandowski Hates Most
I suspect Lewandowski doesn’t trust anyone who gives him a seat at the table, because he understands that inviting him into the group devalues the group. He doesn’t want to be a part of any club that will have him.
Congress
The King of the Rats is a Rat
A better question is why Trump would employ someone with such terrible scruples for such a long time. Why would he want a man of bad character handling his business?