Simple, He knows that all the other candidates are beholding to Big Money Puppet Masters.
He thought that more people should have voted for him because he is the only Honest candidate without hidden agendas that are anti-American and go against American Sovereignty.
He felt for a moment that his struggle on the campaign trail for some Americans-In-Name-Only are not worth the effort but he will persevere in his noble effort.
Sad that people even have to ask for the interpretation.
Why can't his supporters consider the possibility that he is not beholden to the Big Money Puppet Masters because HE IS ONE OF THE BIG MONEY PUPPET MASTERS?