Jersey Girl wrote:1. What are his sources for the absence of a strong maternal force?
Will you share a sample anecdote about that? It doesn't matter which type of source you choose.
As I said, most of the evidences of the absence of a strong maternal force given by Dr. Frank are given in chapter 1 of his book. Here some anecdotal examples:
1. The birth of Robert, Donald's youngest sibling when Donald was only 2 years old. According to Dr. Frank, "Robert's birth was difficult, followed by near-fatal hemorrhaging and a series of subsequent life-threatening infections and surgeries, which required several years of recovery and left Mary Trump in fragile heath thereafter." This was, of course, not his mother's fault, but it limited the amount of time and energy she had to devote to nurturing two year old Donald at the same time he acquired a new brother who displaced him from the position of the "baby of the family," which undoubtedly sparked some sibling rivalry and resentment of his younger brother.
2. When she finally recovered some measure of her health and stamina, she spent a lot of her time "...managing a house with servants, busying herself with volunteer work, and famously riding around Queens in a rose-colored Rolls Royce with vanity plates, collecting the change from her husband's building's laundry machines."
3. Dr. Frank quotes Politico's Michael Kruse, one of his sources about Trump's early life, who said, "Mary Trump simply wasn't very present in Donald's Childhood." Kruse further reported that, "..."Trump's childhood friends attest to her absence: Mark Goldberg, described as 'an early pal,' reports that while Trump's father 'would be around to watch him play,' his mother 'didn't interact in that way.'"
For much more relevant details on this, see the book when you get a chance to read a copy of it.

If your local county library doesn't have a copy, check to see if they have a program similar to the one by which my county library was able to get one at no cost to me.