Complex sentence: The U.S. had grown more suspicious of the Guatemalan Revolution as the Cold War developed and the Guatemalan government clashed with U.S. corporations on an increasing number of issues, and the Cold War predisposed the Truman administration to see the Guatemalan government as communist.
Split into simpler sentences: The U.S. had grown more suspicious of the Guatemalan Revolution as the Cold War developed and the Guatemalan government clashed with U.S. corporations on an increasing number of issues. In addition, the Cold War predisposed the Truman administration to see the Guatemalan government as communist.