Do both parties exploit campaign finance loopholes and lax laws?
"When it comes to matters of money and politics, there is a big gulf between Democrats and Republicans — in theory. Democrats tend to favor rules limiting the flow of money into political campaigns. Republicans see campaign cash as a form of protected political speech and oppose restrictions.
In the real-world practice of politics, both sides are willing to do whatever it takes to raise enough money to win."
WaPo has more.