Because through the election the other candidates did not get enough votes to continue running and new they would not get enough to catch up to Hillary and/or trump so they dropped out of the election which left the two remaining candidates or trump and Clinton
Barkans is the right answer
I hope this helps
If the President would like to do anything related to the raising of revenue, the President will need to follow the Origination Clause and address the United States House of Representatives. Specifically, it will need to be addressed to a member of the House Ways and Means Committee who is responsible for opening discussion on all revenue raising proposals.