Complex sentence: Over the course of his career, Trump has initiated and been the target of "hundreds" of civil lawsuits, which his lawyer Alan Garten said in 2015 was "a natural part of doing business in this country".
Split into simpler sentences: Over the course of his career, Trump has initiated and been the target of hundreds of lawsuits. His lawyer Alan Garten said in 2015 that this was "a natural part of doing business in this country".