How can we reform campaign financing?

I think that it’s outRAAAAAgeous that a hedge fund manager in NYC can write a $2 million dollar check to a congressional candidate in WA state. I propose that the only people who can contribute to a campaign are the people who can vote for that candidate. For instance, only WA state residents could contribute to the campaigns of candidates running for Senator of WA state. The same for Representative seats. Only the folks who vote in my district should be able to contribute to the candidates running for office in my district. After all, my Congressional men and women are supposed to represent my interests, not those of someone in NYC.