Mr Skinner would be now unemployed
He responded by not helping because he didn’t want to fight a war across an ocean
It reflects economic and social changes by having people of different status interacting. It also shows a woman in the picture who wouldn't be in there if not to show changes in the social situation.
By threatening a veto, the President can persuade legislators to alter the content of the bill to be more acceptable to the President. Congress can override a veto by passing the act by a two-thirds vote in both the House and the Senate. (Usually an act is passed with a simple majority.)
I am sure it would be based on the benefits of profitable trading but check just in case