Campaign Finance: How Much Does a Congressman Cost?

Democracy is a Billion dollar industry.  Where does this money come from?  What exactly is it buying?  We look at the rules surrounding campaign contributions and question whether or not they strike an equal balance between protecting the legitimacy of our democratic system and the constitutionally protected right to free speech.  When all the cash is counted, does the average citizen have a realistic way to make a meaningful difference in our elections?