More money, more problems. What's going on with campaign finance rules?

89.3 KPCC:
"Since the Supreme Court gave the green light to allow unlimited sums of money to flow into political campaigns, the rules on what is and is not allowed in terms of money and disclosure has become increasingly unclear. Most projections indicate that the candidates in the 2012 presidential race will raise unprecented amounts of money--President Obama is expected raise close to a billion."