Trump was 41, the newly minted author of " The Art of the Deal" and hearing the first words of encouragement that he should run for president.老师好，比如说这句的author and hearing

这是新闻体语言，不清楚这点，就会不知所云

首先做个猜想

Numbers 24:4: He saith, who heareth the words of God, Who seeth the vision of the Almighty, Falling down, and having his eyes open:

我怀疑 hearing the words 既有字面的含义，也可能跟这段文字有关，也就是hearing the  words 它背后是否多少会有点表示重大事情的的味道。

其次，作为那句话，我给你补上几个字，你再看看：

Trump was 41, who was not only the newly minted author of " The Art of the Deal" and also who was hearing the first words of encouragement that he should run for president.

至于这里also前面为什么成了and, 主要是因为省略造成句子变化很大，因而自然就跟着用了and. 这种地方显然不是简单的语法问题。又如：He was thin, and he was also tall. 读起来很自然。另外，不省略，塞进两个who，不是一般的难看。