How can the president influence the establishment of us foreign policy?
negotiating treaties

confirming ambassadors

declaring war

increasing spending on foreign aid

The president can do all of these actions but as far as influencing the establishment of US foreign policy I believe the most relevant answer is

A) negotiating treaties

Hope this helps!

:)

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

a stronger central government  

its what they are