One Page Legislative

In your textbook in Chapter Ten, Congress and the President, under the section on legislative-executive conflict, it includes the following statement: 

            “Legislative-executive conflicts were evident in 1789, they are present today, and they can be expected in the future for at least three reasons.” (p. 302-3. These page numbers may vary according to which version was purchased)

            What are the three reasons?

            Please list and elaborate on each.

ONE PAGE. APA FORMAT.