The Supreme Court of the USA ruled today there is no cap on campaign donations so you are now officially under an illusion if you think your vote matters. The only way we can overturn this ruling as a nation is to create and pass an amendment to the Constitution.
Article: http://www.cnn.com/2014/04/02/politics/scotus-political-donor-limits/
Article: http://www.cnn.com/2014/04/02/politics/scotus-political-donor-limits/