Always wondered about this… Are politicians really so beholden to an anonymous donor that makes a single $50k donation? Or even a single $500k one? Or is it

Always wondered about this… Are politicians really so beholden to an anonymous donor that makes a single $50k donation? Or even a single $500k one? Or is it the real knowledge that said known regular donors will continue indefinitely as long as things go their way (and indefinitely support the opposition otherwise) …? The pessimistic part of me wonders if a grassroots campaign that raised $10M would even be able drive any change with it.