Congress is responsible for editing, discussing and passing the bill. Both houses of Congress have to agree on the same version of the final bill until it goes to the President.
The President has three options, he can veto the bill, rejecting it and making it return to Congress with the reasons for the veto. Congress in this case, can override the veto with a 2/3 vote.
If the President agrees with the bill, he can sign and approve it, only with his signature the bill with becoming a law.
make treaties with the approval of the Senate. veto bills and sign bills. represent our nation in talks with foreign countries. enforce the laws that Congress passes.
containment was the US' attempt to prevent the spread of communism. they implemented things such as NATO which gave the western countries a defense team against communism, the Marshall plan which helped European countries recover after ww2 which stopped them from being vulnerable enough for the communist countries to take over. (they also used military force as seen in vietnam but its not a policy)