To what extent are earmarks good/bad for democracy?

Santorum defends his previous support for 'earmarks' in Congress, but claims that he would still stop them as President.

Romney criticises Santorum for voting for the 'bridge to nowhere'. SEE HERE

US Politics: What are primaries?

http://www.2012presidentialelectionnews.com/2012-republican-primary-schedule/

http://www.youtube.com/watch?v=UhXloflMNO4