What does truman mean when he claimed should we fail to eight greece and turkey in this fight for our the fact to be far reaching to the west as well as to the east

Truman meant that if they do not follow the containment policy (failing to aid Greece, Turkey and other nations prone to falling to communism), communism will spread and makes its way into the West. Hope this helped.

If he breaks the law then he had to resign from his post and so he'll lose his/her powers.