This will keep the likes of George Soros from sending millions to Israel to defeat candidates that they don't like. Anybody can still contribute, they just have to reveal who sent the money. That way the voters can decide if they are willing to listen to the voice of outsiders or listen to the singular minority voice being projected totally out of proportion because of disproportional capitalization of the minority candidate. At least, those 'special' candidates can be identified.
Iran deal opposition grows among U.S. Republicans, Reuters poll shows (Reuters)
from the article: Leftists denounce new bill on NGO funding as 'McCarthyist'