Complex sentence: Netanyahu was interested in involving people who had not formerly been involved in politics, and Brody found it difficult to turn away Netanyahu, who impressed upon his that it would be important to Israel for him to run for office.
Split into simpler sentences: Netanyahu was interested in involving people who had not formerly entered into politics. And Brody found it difficult to turn away Netanyahu, who impressed upon him that it would be important to Israel for Brody to run for office.