The correct answer is to protect domestic businesses.
When the US government puts a tax on an imported good (aka a tariff) they are trying to protect American businesses. The US government, when it passes tariffs, believe that the increased price of foreign goods with result in citizens buying goods from American made companies, as they will be similar in price or cheaper. This strategy has been used by the United States since the early 1800's and continues to be used as a means of protecting American businesses.
However, the succeess of these types of tariffs are mixed, as this usually results in a decrease in trade and an overall increase in price for consumer goods.
Winston Churchill led Britain during WW2
U.N. resolution condemning the use of atomic weapons
By tradition, the Presidential election begins after a
candidate is officially nominated at the national convention. Before the
candidate is officially nominated at the national convention, he or she can
unofficially continue the campaign process, but it would be of no importance if
he or she does not get nominated in the national council. It is a tradition
that after the completion of the national council, the selected candidates start
their campaign from the month of November. It has been seen that several
candidates start seeking money for the campaign long before the completion of
the national convention.