What was American policy towards the Soviet Union centered on?

What was American policy towards the Soviet Union centered on?

American policy towards the Soviet Union was centered on the following considerations:
（1）To keep the Soviet Union in the war so that the United States could win the war with the least sacrifice.
（2）To get the Soviet Union into the war against Japan.
（3）To influence Soviet foreign policy so that there would be some kind of cooperation after the war but at the same time to be very watchful about Soviet expansive intention.